Software Engineering Articles

Understanding Event-Driven Architecture – Source of Truth vs. Notifications

March 28, 2026

Event Driven architecture has moved from the fringes of distributed systems design into the mainstream. As organizations scale their Microservices and decouple their monoliths, the allure of asynchronous communication becomes undeniable. However, with this adoption comes a pervasive confusion that trips up even seasoned architects. The most dangerous of these misconceptions revolves around the status of the event itself. Specifically, whether the event stream serves as the authoritative Source of Truth or merely a transient notification mechanism. This distinction is not merely academic. It fundamentally alters how an Effective Engineering Team designs data models, handles failures, and implements compliance. Getting this wrong leads to data loss, inconsistent state, and systems that are impossible to debug.

The Fundamental Confusion – State vs. Transition

To understand whether events should be the Source of Truth, we must first ruthlessly define our terms. In database theory, the State represents the current status of an entity. If you look at a user record in a SQL table, you see the current email, the current subscription plan, and the last login date. This is the present reality. In contrast, an event represents a Transition. It is a fact that occurred at a specific point in time. An event says, User changed email at 10:00 AM. It captures the intent and the delta, not necessarily the total cumulative state.

The confusion arises because you can derive the current state by replaying all past transitions. This concept is the bedrock of Event Sourcing. However, just because you can derive state from events does not automatically mean events are the Source of Truth in every architecture. An Effective Engineering Team must decide if their system relies on the event log as the primary record (Event Sourcing) or if the event is simply a signal indicating that a record in a separate Database of Record has changed.

Scenario One – Events as the Source of Truth

When events are treated as the Source of Truth, the architecture shifts from a State-oriented mindset to a Fact-oriented mindset. Here, the event stream is the permanent, immutable log of everything that ever happened. The database, if one exists, is merely a projection or a materialized view of those events.

Consider a financial ledger system or a high-scale auction platform. In these domains, the audit trail is the product. You cannot simply update a balance. You must record a transaction that resulted in that balance.

Imagine a banking system using Event Sourcing. We do not store a Balance column. We store events like MoneyDeposited and MoneyWithdrawn.


 {
 "eventType": "MoneyDeposited",
 "aggregateId": "account-123",
 "amount": 500.00,
 "timestamp": "2023-10-27T10:00:00Z",
 "causationId": "tx-998877"
 }

To determine the current balance, the system reads all events for account-123 and applies them sequentially.

Balance = 0 + 500 (Deposited) - 200 (Withdrawn) = 300

In this scenario, the event is the Source of Truth. If the database storing the current balance crashes, we simply replay the event log to rebuild the state. This offers immense benefits for debugging and compliance. Engineering leadership often mandates this approach in industries where auditability is non-negotiable. You never lose history. You know exactly why the system is in its current state.

Use Cases for Event Sourced Truth

Collaborative document editing, similar to Google Docs, often utilizes Operational Transformation or CRDTs (Conflict-free Replicated Data Types). Here, the truth is the sequence of keystrokes and formatting commands. If you only stored the final document state, you would lose the ability to resolve conflicts when two users edit the same paragraph simultaneously.

Supply chain tracking also requires an immutable history. An item moving from Warehouse to Truck to Delivered is a lifecycle. Storing only Status: Delivered loses the context of when it left the warehouse and how long it was in transit. The event stream provides the provenance required to diagnose bottlenecks.

Scenario Two – Events as Notifications (The Database is Truth)

Conversely, many systems function optimally when events are treated as lightweight notifications, while a traditional database acts as the Source of Record. In this model, the event carries minimal data just enough to signal a change and directs the consumer to the authoritative data store to fetch the full context.

Consider a standard ecommerce application. When a user updates their profile picture, an event ProfilePictureUpdated might be emitted. This event notifies the image resizing service to generate thumbnails. Does this event need to be the permanent Source of Truth ? Likely not.

In this model, the User table in a relational database (PostgreSQL, MySQL) remains the Source of Truth. If the event is lost, or if the resizing service fails, we can query the User table, find users with unprocessed images, and retry the operation. The event is ephemeral, acting as a trigger for workflow, not as the ledger of record.

Use Cases for Notification Events

User notification systems rely heavily on this pattern. When a password is changed, an event PasswordChanged triggers an email service. The event does not need to be stored forever. Once the email is sent, the event has served its purpose. Storing these events indefinitely creates bloat and storage costs without corresponding value.

Cache invalidation is another prime example. Service might listen to a CacheInvalidate event. The event tells the cache to drop a specific key. The Source of Truth remains the database. If the event is missed, the cache might be stale temporarily, but a Time-To-Live (TTL) policy eventually corrects the state. The system is resilient because the database holds the authority, not the event stream.

Comparative Analysis: Making the Choice

Choosing between these two paradigms is a critical decision during the design. The wrong choice results in dual write problems where the database update succeeds but the event emission fails, leading to system-wide inconsistency.

The following table outlines the differences.

Feature	Events as Source of Truth (Event Sourcing)	Events as Notifications (State-Based)
Primary Storage	Append-only Log (Kafka, EventStoreDB)	Database (PostgreSQL, MongoDB)
State Derivation	Calculated on the fly via replay	Direct read from tables
Data Retention	Indefinite / Policy-based retention	Transient / Short-lived
Complexity	High (requires snapshots, event versioning)	Low (standard CRUD operations)
Auditability	Native and inherent	Requires explicit logging implementation
Best Fit	Financial, Audit, Complex State Machines	Notifications, Cache Invalidation, Analytics

The Hybrid Approach and the Outbox Pattern

In reality, most robust systems do not strictly adhere to one extreme. They often employ a hybrid approach. The Source of Record remains the database, but to solve the consistency problem between the database and the event stream, architects utilize the Transactional Outbox Pattern.

This pattern ensures that an Effective Engineering Team never faces the dilemma of a database commit succeeding while the event fails to publish. Instead of writing to the database and then publishing to a message broker, the application writes the business data and the event message into a local “Outbox” table within the same database transaction.

			
BEGIN TRANSACTION;
-- Update the business entity  
UPDATE orders 
SET status = 'CONFIRMED' 
WHERE id = 'order-123';
-- Insert the event into the outbox  
INSERT INTO outbox (id, aggregate_type, aggregate_id, payload)  
VALUES ('evt-456', 'Order', 'order-123', '{"status": "CONFIRMED"}');
COMMIT;

		

Separate process (polling publisher or Debezium connector) reads the Outbox table and publishes the event to the message broker. Once successfully published, the Outbox entry is marked as processed or deleted.

This effectively bridges the gap. The database remains the Source of Truth for the service, but the event stream becomes a reliable, eventually consistent representation of that truth for the rest of the organization. This allows downstream services to react to changes without coupling themselves directly to the internal database schema of the owning service.

Real-World Failure Scenario

To illustrate the gravity of this choice, consider a logistics company that misunderstood this distinction. They treated events as Source of Truth for package location, but they did not implement proper idempotency checks on their consumers.

PackageArrived event was emitted. The consumer service failed to acknowledge the message processing successfully before crashing. The message broker, configured with at least once delivery, redelivered the message upon restart.

Because the system treated the event as the Source of Truth without transactional safeguards, the package status was updated twice. Inventory counts were skewed, showing 2 items when only 1 existed. This phantom inventory issue took weeks to debug because the engineering team assumed the event stream was inherently correct and idempotent, lacking the defensive coding required for asynchronous flows.

This highlights that treating events as the Source of Truth requires sophisticated engineering discipline regarding idempotency and event versioning. If the schema of the event changes, old events in the log must still be decipherable, or upcasters must be written to transform old formats into new ones. This maintenance burden is often underestimated.

Governance and Engineering Leadership

Design plays a pivotal role in establishing the conventions around event truthfulness. It is insufficient to leave this decision to individual developers. Without a clear directive, one team might implement Event Sourcing, storing massive JSON blobs in Kafka indefinitely, while another team might treat events as fire-and-forget notifications. This creates a fragmented architecture where service boundaries are unclear.

Standard mandate must exist. Common guideline is as follows. If the data represents a business fact that is legally binding or required for financial reconstruction, it belongs in an Event Sourced model or a dedicated ledger database. If the data represents a transient signal or a state change that can be re-fetched from a database, it should be treated as a notification.

Myth Busting – Immutability and Compaction

Persistent myth is that events, if they are the Source of Truth, must remain raw and unchangeable forever. This leads to the fear of unmanageable data growth. However, modern stream processing platforms like Apache Kafka support Log Compaction.

Log Compaction ensures that Kafka retains at least the last known value for each key within a topic. If you have a topic representing the state of a user profile, and a user updates their profile 1,000 times, compaction ensures you do not need to replay 1,000 events to get the current state. You only need to read the latest event for that user key.

This allows events to act as a Source of Truth without the heavy burden of infinite history storage for state-based entities. It essentially turns the event log into a compacted key-value store that is still distributed and append-only. This blurs the line between Event Log and Database, empowering teams to use events as the definitive record for current state while retaining the durability of a log.

Key Takeaways

Navigating the myths of Event Driven flows requires a nuanced understanding of data ownership. Events are not magic. They are data structures that require the same rigorous governance as database tables.

When deciding on the role of events, architects should evaluate the cost of replay versus the cost of query. In Event Sourcing (Events as Truth), the cost is paid during read operations (replaying state) or during complex snap shotting logic. In State-based systems (DB as Truth), the cost is paid in maintaining referential integrity and handling the dual-write problem between the database and the event stream.

An Effective Engineering Team recognizes that these patterns are not mutually exclusive. Single system might use Event Sourcing for the core financial transaction engine while using Notification Events for the user notification service. The architecture must align with the business requirements of the specific bounded context.

Conclusion

The question of whether events are the Source of Truth is not a binary yes or no, but rather a strategic architectural decision that dictates data flow, storage strategy, and system reliability. Treating events as the Source of Truth, as in Event Sourcing, provides a robust audit trail and powerful temporal debugging capabilities, making it indispensable for critical operational systems. However, it introduces complexity in terms of event versioning and state re-hydration.

Conversely, treating events as notifications, backed by a database as the Source of Record, simplifies development and fits naturally with standard CRUD applications, though it requires mechanisms like the Outbox Pattern to ensure consistency.

Ultimately, the truth is defined by what your organization decides to trust as the record of authority. By understanding the trade-offs between state and transition, and by implementing patterns like Outbox and Compaction, teams can build systems that are not only scalable and reactive but also correct and auditable. Avoiding the trap of the dual write and respecting the distinct roles of events versus state is what separates a fragile distributed system from a resilient, production-grade platform.

Mitigating Risks: Insights from 2025 OWASP Top Ten

March 15, 2026
The digital landscape continues to evolve at an unprecedented pace, and with it, the threat landscape for web applications grows increasingly sophisticated. The Open Web Application Security Project (OWASP) Top Ten has long served as the definitive benchmark for organizations seeking to understand and mitigate the most critical web application security risks. As we navigate through, the latest iteration of this influential list reflects the dramatic shifts in technology adoption, attack vectors, and defensive capabilities that have emerged in recent years.

Security professionals and development teams worldwide rely on the OWASP Top Ten as a foundational resource for prioritizing vulnerability remediation efforts and building robust application security programs. Understanding these risks is no longer optional for organizations that handle sensitive data or provide critical digital services.

The Evolution of Application Security Standards

The OWASP Top Ten has historically served as an awareness document, helping organizations focus their security investments on the most prevalent and impactful vulnerabilities. However, the 2025 edition represents a paradigm shift in how we conceptualize application security. Rather than simply cataloging vulnerability categories, the new framework emphasizes the interconnected nature of modern security challenges and the systemic approaches required to address them effectively.

An effective engineering team recognizes that security cannot be bolted on as an afterthought. The 2025 OWASP Top Ten reflects this reality by highlighting risks that span the entire software development lifecycle, from design through deployment and maintenance. This holistic perspective demands that engineering leadership foster cultures where security considerations are embedded in every decision, from architecture reviews to code commits.

A01:2025 – Broken Access Control

Broken access control remains the most prevalent and dangerous vulnerability category, maintaining its top position from the previous iteration. This category encompasses failures in enforcing what authenticated users are permitted to do, leading to unauthorized access to sensitive data, modification of data, or privilege escalation.

The complexity of modern applications has exacerbated this risk significantly. Microservices architectures, where dozens or hundreds of services must coordinate access decisions, create numerous opportunities for inconsistent policy enforcement. Consider a scenario where a user authenticates to a frontend service, but the back-end microservice fails to properly validate whether that user has permission to access a specific resource.
// Vulnerable implementation - missing authorization check app.get('/api/orders/:orderId', async (req, res) => { const order = await Order.findById(req.params.orderId); // Missing: verify req.user.id === order.userId res.json(order); }); // Secure implementation - proper authorization app.get('/api/orders/:orderId', async (req, res) => { const order = await Order.findById(req.params.orderId); if (!order || order.userId.toString() !== req.user.id) { return res.status(404).json({ error: 'Order not found' }); } res.json(order); });
Real-world exploitation of broken access control has led to some of the most damaging breaches in recent history. Attackers frequently leverage insecure direct object references (IDOR) to access data belonging to other users by simply modifying parameters in requests. Notable incident involved a major healthcare platform where researchers discovered that patient records could be accessed by manipulating the patient ID in API requests, exposing millions of sensitive medical records.

Prevention strategies require a defense-in-depth approach. Every request must be authenticated and authorized on the server side. Implementing proper role-based access control (RBAC) or attribute-based access control (ABAC) ensures consistent policy enforcement across all application components. Logging access control failures and alerting administrators of repeated violations provides detection capabilities for ongoing attacks.

A02:2025 – Cryptographic Failures

Previously known as Sensitive Data Exposure, this category has been renamed to emphasize the root cause rather than the symptom. Cryptographic failures involve improper implementation of encryption, hashing, or key management that leads to exposure of sensitive data.

The proliferation of data protection regulations worldwide, including GDPR, CCPA, and industry-specific requirements, has raised the stakes for cryptographic failures. Organizations found violating these regulations face substantial financial penalties and reputational damage. More critically, individuals whose data is compromised suffer real harm ranging from identity theft to financial fraud.

Common cryptographic failures include transmitting sensitive data in clear text, using weak cryptographic algorithms or protocols, employing default or weak encryption keys, and failing to properly validate server certificates. The transition to TLS 1.3 has helped address some protocol-level weaknesses, but implementation errors remain prevalent.
# Vulnerable implementation - weak hashing import hashlib def store_password(password): return hashlib.md5(password.encode()).hexdigest() # Secure implementation - proper password hashing import bcrypt def store_password(password): salt = bcrypt.gensalt(rounds=12) return bcrypt.hashpw(password.encode(), salt) def verify_password(password, hashed): return bcrypt.checkpw(password.encode(), hashed)
Engineering leadership must ensure that cryptographic decisions are made by knowledgeable security professionals rather than left to individual developers who may lack specialized expertise. Establishing organizational standards for encryption algorithms, key lengths, and key management procedures provides consistent protection across all projects. Regular security audits and penetration testing help identify cryptographic weaknesses before they can be exploited.

A03:2025 – Injection

Injection attacks remain a persistent threat, despite being well-understood for decades. This category includes SQL injection, NoSQL injection, command injection, LDAP injection, and other similar attacks where untrusted data is sent to an interpreter as part of a command or query.

The continued prevalence of injection vulnerabilities reflects a fundamental tension in software development. Applications must accept and process user input, yet that input represents an inherent security risk. The challenge lies in distinguishing between legitimate input and malicious payloads designed to manipulate application behavior.

Modern applications often incorporate multiple data stores and external systems, each with its own query language and injection risks. Microservices architecture might involve SQL databases, NoSQL document stores, graph databases, and message queues, each requiring specific input validation approaches. This complexity creates opportunities for inconsistent security measures.
// Vulnerable SQL query construction String query = "SELECT * FROM users WHERE username = '" + userInput + "' AND password = '" + passwordInput + "'"; Statement stmt = connection.createStatement(); ResultSet rs = stmt.executeQuery(query); // Secure parameterized query String query = "SELECT * FROM users WHERE username = ? AND password = ?"; PreparedStatement stmt = connection.prepareStatement(query); stmt.setString(1, userInput); stmt.setString(2, passwordInput); ResultSet rs = stmt.executeQuery();
The prevention of injection attacks requires a multi-layered approach. Parameterized queries and prepared statements eliminate SQL injection by separating data from code. Input validation using allow-lists ensures that data conforms to expected formats. Output encoding prevents injection attacks that target downstream systems. An effective engineering team implements automated static analysis tools that detect injection vulnerabilities during code review, preventing them from reaching production environments.

A04:2025 – Insecure Design

Insecure design represents a new category in the Top Ten, reflecting growing recognition that many security vulnerabilities originate in fundamental design decisions rather than implementation errors. This category encompasses flaws in architecture, business logic, and security controls that cannot be fixed by perfect code.

Traditional application security approaches focused on identifying and fixing vulnerabilities in existing code. However, insecure design acknowledges that some security problems are baked into applications from the beginning. A system designed without proper threat modeling may contain inherent weaknesses that no amount of secure coding can address.

Consider an e-commerce platform that allows users to apply promotional codes at checkout. If the system design fails to consider the possibility of users applying multiple promotional codes in unintended combinations, attackers might exploit this business logic flaw to obtain products for free or at significantly reduced prices. No buffer overflow or injection vulnerability exists here, yet the financial impact can be severe.

Threat modeling provides a structured approach to identifying potential security issues during the design phase. By systematically examining potential adversaries, their capabilities, and the assets they might target, teams can incorporate security controls into the architecture from the beginning. Security requirements should be treated with the same importance as functional requirements during the specification phase.

Engineering leadership plays a crucial role in establishing secure design practices. This includes allocating time for threat modeling activities, providing training on secure architecture patterns, and creating reusable security components that development teams can incorporate into their designs. Investing in secure design reduces the cost of security by identifying issues early when they are cheapest to address.

A05:2025 – Security Misconfiguration

Security misconfiguration remains one of the most commonly observed vulnerability categories, reflecting the complexity of modern infrastructure and the challenges of maintaining secure configurations across dynamic environments. This category includes improper cloud storage permissions, unnecessary features enabled, default accounts with unchanged passwords, and overly informative error messages.

The shift to cloud-native architectures has amplified this risk considerably. Infrastructure-as-code templates, container orchestration platforms, and server-less functions each introduce numerous configuration options that affect security posture. Single mis-configured cloud storage bucket can expose terabytes of sensitive data to the internet, regardless of how secure the application code might be.

The 2025 OWASP update emphasizes that security misconfiguration extends beyond infrastructure settings. Application framework configurations, API gateway policies, and even machine learning model deployment parameters all contribute to the attack surface. Each component must be hardened according to security best practices and monitored for configuration drift over time.

Automated configuration validation has become essential for managing this complexity at scale. Continuous compliance monitoring tools can detect when configurations deviate from approved baselines and automatically remediate common issues. Infrastructure-as-code practices enable version control and peer review of configuration changes, reducing the likelihood of insecure deployments.

A06:2025 – Vulnerable and Outdated Components

Modern applications rely heavily on third-party libraries, frameworks, and components, creating a complex web of dependencies that must be tracked and maintained. Vulnerable and outdated components represent a significant attack vector as attackers increasingly target widely-used libraries to compromise numerous applications simultaneously.

The software supply chain has emerged as a critical area of concern. High-profile incidents like the Log4j vulnerability demonstrated how a single flaw in a ubiquitous component can affect millions of applications worldwide. The 2025 OWASP Top Ten reflects this reality by emphasizing the need for comprehensive software composition analysis and continuous monitoring of the dependency landscape.

Managing component security requires visibility into what dependencies exist in an application, including transitive dependencies that may not be directly specified in configuration files. Software composition analysis tools provide this visibility by generating software bills of materials (SBOMs) that catalog all components and their versions.
{ "example_vulnerable_dependencies": { "dependencies": { "lodash": "4.17.15", // Known vulnerability CVE-2020-8203 "axios": "0.19.0", // Multiple vulnerabilities "express": "4.17.1" } }, "updated_secure_versions": { "dependencies": { "lodash": "4.17.21", // Patched version "axios": "1.6.0", // Latest secure version "express": "4.18.2" } } }
An effective engineering team implements automated dependency scanning as part of their continuous integration pipeline. This ensures that vulnerable components are detected and flagged before they reach production. Engineering leadership must establish policies governing dependency management, including procedures for emergency patching when critical vulnerabilities are disclosed.

A07:2025 – Identification and Authentication Failures

Authentication remains a critical control point for application security, and failures in this area can have devastating consequences. This category includes credential stuffing attacks, weak password policies, improper session management, and missing multi-factor authentication for sensitive operations.

The threat landscape for authentication has evolved significantly. Credential stuffing attacks leverage billions of leaked username-password combinations to attempt unauthorized access across multiple platforms. Password spraying attacks try common passwords against many accounts, bypassing lockout mechanisms designed for individual account protection. These automated attacks operate at scales that would have been unimaginable just a few years ago.

Modern authentication best practices have moved beyond simple password-based systems. Multi-factor authentication should be considered mandatory for applications handling sensitive data or providing access to valuable resources. Passwordless authentication methods, including WebAuthn and passkeys, eliminate many traditional attack vectors while improving user experience.

Session management presents its own challenges. Applications must securely handle session tokens, implement appropriate timeout mechanisms, and protect against session fixation and hijacking attacks. The increasing use of JSON Web Tokens (JWTs) has introduced new considerations around token validation, expiration, and revocation.

A08:2025 – Software and Data Integrity Failures

This category addresses assumptions about software updates, critical data, and CI/CD pipelines without verifying integrity. The rise of supply chain attacks has highlighted the dangers of blindly trusting third-party code or infrastructure.

Codebases increasingly rely on external packages and libraries, creating opportunities for attackers to compromise the software supply chain. Malicious actors have successfully injected backdoors into popular npm packages, compromised build systems, and created trojanized versions of legitimate tools. These attacks are particularly dangerous because they exploit the trust relationships inherent in modern software development.

Continuous integration and continuous deployment (CI/CD) pipelines represent another critical attack surface. Compromising a build server allows attackers to inject malicious code into applications without touching the source repository. Securing these pipelines requires implementing proper access controls, auditing all changes, and cryptographically signing build artifacts.

A09:2025 – Security Logging and Monitoring Failures

Without adequate logging and monitoring, security incidents cannot be detected and investigated effectively. This category covers insufficient logging, missing alerting for suspicious activities, and logs that lack the detail necessary for forensic analysis.

The average time to detect a breach remains unacceptably high across industries. Attackers often spend weeks or months inside compromised environments before being discovered, giving them ample time to achieve their objectives. Effective logging and monitoring can dramatically reduce this dwell time, limiting the damage caused by successful attacks.

Security logging must balance comprehensiveness with practicality. Every security-relevant event should be logged, including authentication attempts, access control failures, input validation failures, and administrative actions. However, excessive logging can overwhelm analysis capabilities and create storage challenges. The key is logging the right information in a format that supports efficient analysis.

Modern security operations leverage Security Information and Event Management (SIEM) platforms to aggregate logs from multiple sources and identify patterns indicative of attacks. Machine learning and artificial intelligence enhance detection capabilities by identifying anomalies that might escape human attention. An effective engineering team works closely with security operations to ensure that application logs provide the visibility needed for incident detection and response.

A10:2025 – Server-Side Request Forgery (SSRF)

Server-Side Request Forgery appears as a distinct category in the 2025 update, reflecting its growing prevalence and impact in cloud-native environments. SSRF occurs when an application fetches remote resources based on user-supplied URLs without proper validation, allowing attackers to access internal systems and sensitive data.

The shift to cloud architectures has amplified SSRF risks significantly. Cloud environments provide metadata services that expose sensitive credentials and configuration information. An SSRF vulnerability in a cloud-deployed application can allow attackers to access these metadata services and extract credentials for other cloud resources.

Consider an application that allows users to specify a URL for importing data from external sources. Without proper validation, an attacker could provide a URL pointing to internal services that should not be accessible from the application.
# Vulnerable implementation @app.route('/fetch') def fetch_url(): url = request.args.get('url') response = requests.get(url) # No validation of URL return response.content # Secure implementation with validation @app.route('/fetch') def fetch_url(): url = request.args.get('url') parsed = urllib.parse.urlparse(url) # Block internal IP ranges if is_internal_ip(parsed.hostname): return 'Access denied', 403 # Only allow specific protocols if parsed.scheme not in ['http', 'https']: return 'Invalid protocol', 400 response = requests.get(url) return response.content
Prevention strategies for SSRF include implementing strict input validation for URLs, blocking requests to internal IP ranges and localhost, and using network segmentation to limit application access to internal resources. Some organizations deploy dedicated proxy services for external URL fetching, providing an additional layer of isolation between the application and internal networks.

Emerging Concerns and Future Directions

While the Top Ten captures the most prevalent risks, security professionals must remain vigilant for emerging threats that may not yet appear in vulnerability statistics. The integration of artificial intelligence and machine learning into applications introduces new attack vectors, including model poisoning, adversarial inputs, and data extraction attacks against trained models.

API security has become increasingly important as applications expose more programmatic interfaces. The OWASP API Security Top Ten complements the traditional Top Ten by addressing risks specific to API architectures, including broken object property level authorization, unrestricted resource consumption, and server-side request forgery in API contexts.

Engineering leadership must foster a culture of continuous learning and adaptation. The threat landscape evolves constantly, and yesterday’s best practices may become tomorrow’s vulnerabilities. Regular security training, participation in security conferences and communities, and engagement with threat intelligence sources help teams stay current with emerging risks.

Implementing a Comprehensive Security Program

Addressing the OWASP Top Ten requires more than technical controls. Comprehensive application security program encompasses people, processes, and technology working together to protect organizational assets. Security must be integrated into every phase of the software development lifecycle, from initial design through production deployment and maintenance.

The first step is assessment. Organizations should conduct thorough security assessments of their existing applications to identify vulnerabilities and prioritize remediation efforts. Penetration testing, code reviews, and automated vulnerability scanning each provide different perspectives on security posture. The results of these assessments inform the development of a security roadmap.

Training and awareness programs ensure that all team members understand their role in application security. Developers need training on secure coding practices. Quality assurance engineers need skills in security testing. Operations teams need knowledge of secure deployment and configuration practices. An effective engineering team invests continuously in building security knowledge across all roles.

Automation is essential for scaling security practices. Static application security testing (SAST) tools analyze source code for vulnerabilities during development. Dynamic application security testing (DAST) tools probe running applications for security weaknesses. Interactive application security testing (IAST) combines aspects of both approaches for comprehensive coverage. These tools should be integrated into CI/CD pipelines to provide rapid feedback on security issues.

Metrics and measurement provide visibility into security program effectiveness. Key performance indicators might include vulnerability density, mean time to remediation, security test coverage, and the percentage of applications meeting security standards. These metrics should be tracked over time and reported to engineering leadership to inform resource allocation decisions.

The Role of DevSecOps

DevSecOps represents the integration of security practices into DevOps workflows, ensuring that security is not a bottleneck to rapid delivery but rather an enabler of secure velocity. This approach requires cultural change, tooling investments, and process redesign to embed security throughout the development lifecycle.

In a DevSecOps model, security gates are automated wherever possible, allowing teams to receive immediate feedback on security issues. Security policies are codified and enforced through infrastructure-as-code and policy-as-code implementations. Collaboration between development, security, and operations teams becomes the norm rather than the exception.

Security champions programs extend security expertise into development teams by identifying and training interested developers to serve as local security resources. These champions can provide guidance on security questions, conduct preliminary reviews, and escalate complex issues to central security teams. This model scales security knowledge more effectively than relying solely on a centralized security function.

Conclusion

The OWASP Top Ten for 2025 represents both continuity and change in the application security landscape. While familiar vulnerabilities like injection and broken access control remain prevalent, new categories reflect the evolving technology landscape and emerging threat vectors. Understanding these risks is essential for any organization that develops or deploys web applications.

The responsibility for application security extends beyond the security team to encompass everyone involved in the software development lifecycle. Engineering leadership must champion security initiatives, allocate resources appropriately, and foster cultures where security is valued alongside functionality and performance. An effective engineering team integrates security thinking into daily practices rather than treating it as a separate concern.

As we look toward the future, several trends will likely influence the next iterations of the OWASP Top Ten. Artificial intelligence will become both a target and a tool in the security landscape. Supply chain security will continue to demand attention as software dependencies grow more complex. Privacy requirements will shape how applications handle sensitive data. Throughout these changes, the fundamental principles of secure design, defense in depth, and continuous improvement will remain relevant.

Organizations that invest in building robust application security programs today will be better positioned to address both known risks and emerging threats. The OWASP Top Ten provides a valuable framework for prioritizing these investments, but it should be considered a starting point rather than a complete security strategy. True security requires ongoing vigilance, continuous learning, and a commitment to protecting the users who trust their data to our applications.

Stream Gatherers in Java

March 10, 2026

Since their introduction in Java 8, Streams have fundamentally changed how developers handle collections of data. They brought a declarative style to data processing, allowing programmers to express what they wanted to achieve rather than how to iterate through the elements. For years, the java.util.stream package has remained largely static, relying on a fixed set of intermediate operations like map, filter, and flatMap.

While these operations cover a vast majority of use cases, they exhibit a significant limitation regarding stateful operations. Developers often find themselves in a bind when they need to perform complex transformations that require maintaining state between elements-such as sliding windows, dedicated batching logic, or custom deduplication-without terminating the stream. The Stream Gatherers API, introduced as a preview feature in Java 22 (JEP 461) and standardized later, addresses this gap. It provides a new intermediate operation, gather which allows for custom, stateful intermediate operations to be defined and used within stream pipelines.

This article explores the technical depth of the Gatherer API, demonstrating how it expands the capabilities of the Java Stream ecosystem and enabling a new level of expressiveness in data processing pipelines.

To understand the necessity of the Gatherer API, one must first recognize the constraints of the existing Stream toolkit. Standard intermediate operations in Java are predominantly stateless. Operations like map or filter look at one element at a time without any knowledge of previous or subsequent elements.

When developers need stateful logic, they typically have two options. The first is to use Stream.collect() at an intermediate stage, effectively terminating the stream, processing the data into a collection, and then streaming it again. This breaks the laziness of the stream and forces the entire dataset into memory, which is inefficient for large or infinite streams. The second approach involves using side-effects within stateless operations, such as manipulating an external AtomicInteger or a custom state object inside a map operation. This approach is discouraged because it leads to thread-safety issues and breaks the functional programming paradigm that Streams are built upon.

Consider a scenario where a developer needs to process a stream of sensor readings but only wants to emit a value if the reading has changed significantly from the previous one. This requires a stateful filter. Using standard filter logic is impossible because the predicate only receives the current element. Developers often resort to hacks involving reduce or external mutable state. The Gatherer API solves this by providing a structured, safe, and native way to inject state into the middle of a stream pipeline.

Architecture of the Gatherer API

The Gatherer API introduces a new interface, java.util.stream.Gatherer . It represents an intermediate operation that transforms a sequence of elements from type T to type R. Unlike a Collector, which reduces a stream to a single result or a container, Gatherer produces a new stream. This distinction is crucial. Gatherer is effectively a stream-to-stream transformation machine.

The interface is defined with four core components, mirroring the design of the Collector interface but adapting it for the push-based nature of streams.

The first component is the Initializer. This is a supplier that creates a new instance of the private state object to be used during the evaluation of the stream. This state is isolated per parallel evaluation, ensuring thread safety without requiring the developer to manage synchronization manually.

The second component is the Integrator. This is the heart of the Gatherer. It is a function that integrates a new element from the input stream into the state and potentially pushes elements to the downstream receiver (the next stage in the pipeline). It takes three arguments: the current state, the incoming element, and a Downstream object. The Downstream object acts as a sink whatever is pushed to it becomes the input for the next stage of the stream. The Integrator returns a boolean indicating whether the stream should continue processing or terminate early (short-circuit).

The third component is the Finisher. This is a function that runs after all elements of the input stream have been processed by the integrator. It allows the Gatherer to flush any remaining data held in the state. For instance, in a batching Gatherer, the last batch might not be full when the stream ends. The Finisher is where that partial batch is pushed downstream.

The fourth component is the Combiner. This is relevant only for parallel streams. It defines how the states of two parallel evaluations are merged. This allows Gatherers to be parallelized safely and efficiently.

Understanding the Gatherer Lifecycle

When a stream pipeline containing a gather operation is executed, the lifecycle is strictly defined. The Java runtime invokes the initializer to create a state instance. For a parallel stream, this happens for each split segment of the data.

The integrator is then invoked for every element in the stream segment. The integrator logic can inspect the element, update the private state, and decide what to push downstream. The Downstream interface provided to the integrator offers methods like push(R element) and isRejecting(). The integrator can choose to push zero, one, or multiple elements for a single input element. It can also check isRejecting() to see if the downstream stage is no longer accepting data (for example, if a limit() operation further down the line has been satisfied).

Once the input elements are exhausted, the finisher is called. The finisher receives the state and the Downstream sink. It can perform cleanup or push final accumulated data.

Built-in Gatherers in the JDK

The JDK includes a set of built-in Gatherers accessible via static methods on the Gatherers class. These implementations cover common patterns that were previously difficult to express.

One of the most useful built-in Gatherers is windowFixed. This Gatherer groups elements into lists of a specific size. Before Gatherers, achieving a sliding window or fixed window required complex logic or third-party libraries. With Gatherers.windowFixed(int), the process is declarative and efficient.

Stream.of(1, 2, 3, 4, 5, 6, 7)
.gather(Gatherers.windowFixed(3))
.forEach(System.out::println);
// Output:
// [1, 2, 3]
// [4, 5, 6]
// [7]

Another powerful built-in is fold. While Stream.reduce combines elements into a single result, fold allows for a stateful accumulation that remains lazy. It is similar to a mutable reduction but integrated as an intermediate operation. This is particularly useful when the accumulation logic needs to reset or when developers want to pass partial results downstream during the process.

The scan Gatherer is another essential addition. It performs a prefix scan (also known as a cumulative operation). For example, calculating a running sum or running maximum. Unlike reduce, which produces one final result, scan emits a new result for every input element.

			
Stream.of(1, 2, 3, 4, 5) 
 .gather(Gatherers.scan(() -> 0, Integer::sum)) 
 .forEach(System.out::println); 
// Output: 
// 1 
// 3 
// 6 
// 10 
// 15 

		

Implementing a Custom Gatherer

While built-ins are helpful, the true power of the Gatherer API lies in creating custom implementations. Let us consider a real-world requirement: a Stateful Deduplication. We want to filter a stream of log events so that only the first event of each specific severity level is passed through, ignoring subsequent duplicates of the same level until a different level appears. This is distinct from distinct(), which would eliminate all duplicates globally here, we want local de-duplication based on state.

To implement this, we define a Gatherer. We start by defining the state object. In this case, we need to store the last seen severity.

			
public class LogEvent {
    private String message;
    private int severity;
    public LogEvent(String message, int severity) {
        this.message = message;
        this.severity = severity;
    }
    public int getSeverity() {
        return severity;
    }
    public String getMessage() {
        return message;
    }
}

		

Now we implement the Gatherer distinctBySeverity. We use the factory methods on the Gatherer interface.

			
```java
 Gatherer distinctBySeverity = Gatherer.of(
 // Initializer: The state is the last seen severity (stored as Integer)
 () -> new int[] { -1 },

			
// Integrator: Logic to decide whether to push 
(state, element, downstream) -> { 
 if (state[0] != element.getSeverity()) { 
 state[0] = element.getSeverity(); 
 downstream.push(element); 
 } 
 return true; // Continue processing 
} 
// No Finisher needed 
// No Combiner needed for sequential stream

		

This custom Gatherer maintains an int[] as state. Since arrays are mutable, we can update the state directly. The integrator checks if the current element’s severity differs from the stored state. If it differs, it updates the state and pushes the element downstream. If it matches, it ignores the element. This logic runs lazily, handling infinite streams perfectly without buffering the entire dataset.

Short-Circuiting and Infinite Streams

One of the most sophisticated aspects of the Gatherer API is its support for short-circuiting. In standard Streams, operations like limit() or findFirst() can stop the pipeline early. Custom Gatherers can implement this same behavior.

The Integrator returns a boolean. If the integrator returns false, the stream source is signaled to stop producing elements. This allows for the creation of Gatherers that can process infinite streams and stop based on a condition internal to the Gatherer.

Imagine a Take Until Duration Gatherer. This Gatherer should process elements until a specific amount of time has elapsed since the start of processing.

			
```java
 static Gatherer takeUntilDuration(Duration duration) {
         return Gatherer.of(
         // State: Start time stored as a long
         () -> new long[] { System.nanoTime() },
         // Integrator
         (state, element, downstream) -> {
         long elapsed = System.nanoTime() - state[0];
         if (elapsed < duration.toNanos()) { 
               downstream.push(element); 
               return true; 
           // Continue } return false; // Stop the stream } ); } ``` This example illustrates the power of the API. We have created an intermediate operation that terminates a stream based on time, a logic that previously required a custom Spliterator or an external side-effect. The return value `false` in the integrator efficiently stops the data pull from the source, preserving resources. Parallelism and the Combiner For sequential streams, the combiner component of a Gatherer is unnecessary. However, to support parallel streams correctly, a Gatherer must define how to merge states. When a stream is processed in parallel, the input is split into segments. Each segment runs its own Gatherer instance with its own isolated state. Once the segments are processed, the states must be combined, and the accumulated results must be pushed downstream. This logic resides in the Combiner. Let us look at a parallel-friendly "Summing Gatherer" that pushes the sum downstream only at the end. Note that this is distinct from `reduce` because it is an intermediate operation; you could map the sum to another object or filter it afterward. ```java Gatherer sumGatherer = Gatherer.of(
         // State: Mutable integer
               () -> new int[] { 0 },
         // Integrator: Accumulate
         (state, element, downstream) -> {
             state[0] += element;
         return true;
 },
 // Combiner: Merge two states (for parallel)
         (state1, state2) -> {
             state1[0] += state2[0];
             return state1;
         },
         // Finisher: Push the final sum
         (state, downstream) -> {
             downstream.push(state[0]);
         }
 );
 ```

		

This Gatherer works correctly in a parallel stream. The runtime splits the stream, accumulates sums in different threads, combines the partial sums using the Combiner, and finally pushes the total result via the Finisher. The ability to define this logic explicitly ensures that Gatherers are not just syntactic sugar but robust tools for high-performance data processing.

Comparison with Existing Approaches

To fully appreciate the Gatherer API, it is helpful to compare it with existing strategies for similar problems.

HTML Table: Comparison of Stream Processing Strategies

Feature	Stream.collect()	Side-Effects (map/filter)	Gatherer API
Laziness	No (Eager)	Yes	Yes
State Management	Terminal State	External/Mutable	Internal/Encapsulated
Thread Safety	Safe (Concurrent Collectors)	Risky (Manual sync needed)	Safe (Isolated state per segment)
Short-Circuiting	No	Possible but complex	Native Support
Stream Output	Single Result (Collection)	Stream	Stream

The table highlights that collect is eager and terminal, making it unsuitable for intermediate transformations. Side-effects within map or filter break the functional purity and thread-safety guarantees of streams. The Gatherer API sits in the sweet spot, offering the laziness of intermediate operations with the statefull capability of collectors, all while maintaining thread safety and encapsulation.

Real-World Use Case: Intelligent Batching

Common requirement in enterprise systems is batching data for external API calls or database inserts. Often, simple fixed-size batching (as provided by Gatherers.windowFixed) is insufficient. We might need Time-Window Batching or Condition-Based Batching.

For instance, consider a stream of network packets. We want to batch packets until we reach a specific byte size limit or a specific count, whichever comes first. This is a stateful decision process.

We can implement a smartBatch Gatherer.

			
```java
 public static Gatherer> smartBatch(int maxSize, int maxCount) {
 return Gatherer.of(
 // State: Current batch list and current size
 () -> new Object() {
 List batch = new ArrayList<>();
 int currentSize = 0;
 },
 // Integrator
 (state, element, downstream) -> {
 state.batch.add(element);
 state.currentSize += element.getSize();

		

			
if (state.currentSize >= maxSize || state.batch.size() >= maxCount) { 
 downstream.push(new ArrayList<>(state.batch)); 
 state.batch.clear(); 
 state.currentSize = 0; 
} 
return true; 
}, 
// Finisher: Flush remaining 
(state, downstream) -> { 
 if (!state.batch.isEmpty()) { 
 downstream.push(state.batch); 
 } 
} 
); 

		

This Gatherer logic is encapsulated and reusable. It pushes List downstream only when the constraints are met. If the stream is infinite, it continues to emit batches. If the stream is finite, the finisher ensures the last partial batch is processed. This level of control was previously the domain of custom Iterators or complex loops, but now it fits seamlessly into the Stream paradigm.

Conclusion

The Stream Gatherers API represents a significant maturation of the Java Stream framework. It acknowledges that real-world data processing is rarely a simple stateless mapping or filtering exercise. By providing a structured mechanism for stateful intermediate operations, the API fills a long-standing capability gap.

Developers can now express complex logic-such as sliding windows, custom batching, and state-ful deduplication-in a way that is lazy, parallelizable, and encapsulated. The separation of concerns enforced by the Gatherer interface (Initializer, Integrator, Finisher, Combiner) ensures that code remains readable and maintainable, even when the logic is intricate.

As Java continues to evolve, features like the Gatherer API demonstrate a commitment to enabling developers to write high-performance, declarative code without sacrificing the flexibility required for sophisticated data manipulation. Whether utilizing the built-in Gatherers utility class or implementing custom interfaces for domain-specific logic, the gather method is poised to become a standard tool in the professional Java developer’s arsenal, transforming how we think about intermediate stream operations.

Maximizing Engineering Team Effectiveness

March 2, 2026

Introduction

In modern product development environments the speed of delivery and the quality of outcomes are directly linked to how well a group of engineers functions as a cohesive unit. The concept of team effectiveness goes far beyond simple collaboration.It is a measurable set of behaviors, processes, and cultural cues that together enable an engineering organization to meet ambitious goals. One of the most powerful mechanisms that drive sustained improvement is the feedback loop. When feedback is timely, specific, and acted upon, it creates a virtuous cycle that sharpens technical execution, aligns expectations, and fuels continuous learning. This article dives deep into the mechanics of building effective engineering teams, outlines the technical structures that support robust feedback, and illustrates each principle with concrete real world examples. The discussion is framed for senior engineering leaders, engineering managers, and anyone responsible for shaping the performance of high‑impact technical groups.

Why Team Effectiveness Matters for Engineering Leadership

Effective engineering teams deliver software faster, with fewer defects, and at lower cost. They also exhibit higher employee engagement, lower turnover, and stronger alignment with business objectives. For engineering leadership the challenge is twofold, first, to identify the dimensions that define a high performing group and second, to implement systematic processes that keep those dimensions operating at peak levels. Research from the field of organizational psychology shows that teams that regularly reflect on their work and exchange constructive feedback outperform those that rely on ad‑hoc communication. The measurable benefits include a 20‑30 percent reduction in cycle time, a 15 percent improvement in defect detection, and a marked increase in predictability of releases.

Core Elements of Team Effectiveness

Three pillars form the foundation of any effective engineering team – shared purpose, transparent processes, and disciplined feedback loops. Each pillar contains sub-components that can be observed, measured, and refined.

1. Shared Purpose

Clear mission aligns every engineer’s daily effort with broader product outcomes. When the purpose is articulated in concrete terms such as “reduce checkout latency by 40 percent within the next quarter” team members have a tangible target that guides decision making.

2. Transparent Processes

Process transparency eliminates hidden bottlenecks. It includes visible work boards, well defined Definition of Done, and clear escalation paths for blockers. When engineers understand how work flows from idea to production, they can anticipate dependencies and intervene early.

3. Disciplined Feedback Loops

Feedback loops are the mechanisms that collect information, evaluate performance, and trigger corrective actions. They exist at multiple levels – individual, peer, team, and organizational. The loops must be rapid enough to influence ongoing work and structured enough to produce actionable insights.

Strong engineering leadership invests in each pillar, but the most rapid gains are often realized by tightening feedback loops. The following sections explore the technical underpinnings of feedback, how to embed them in daily rituals, and how to scale them across large organizations.

Feedback Loop Taxonomy for Technical Teams

Feedback loops can be categorized by the source of the signal, the frequency of the exchange, and the depth of analysis. The table below provides a concise comparison of the most common loop types used in software development environments.

Loop Type	Signal Origin	Typical Frequency	Primary Goal
Code Review Feedback	Peer Engineer	Per Pull Request	Improve code quality and share knowledge
Automated Test Results	CI System	Every Build	Detect regressions early
Sprint Retrospective Insights	Team Collective	Every Sprint	Identify process improvements
Operational Metrics	Monitoring Stack	Continuous	Validate performance against Service Level Objectives
One on One Coaching	Manager to Individual	Biweekly or Monthly	Develop career path and address personal blockers

Understanding this taxonomy helps engineering leadership select the right mix of tools and ceremonies to cover every critical feedback surface.

Designing a Technical Feedback Infrastructure

Robust feedback infrastructure consists of three layers – data collection, analysis, and action. Each layer has specific technology choices and process guidelines.

Data Collection

Version control platforms provide pull request events, commit metadata, and reviewer comments.
Continuous integration pipelines emit test pass/fail signals, build times, and coverage percentages.
Observability stacks (metrics, logs, tracing) stream latency, error rates, and resource utilization.
Survey tools capture sentiment data from retrospectives and pulse checks.

Analysis

Raw signals must be transformed into meaningful insights. This is where dashboards, alerting policies, and automated triage scripts add value. For example, a script that correlates increased build times with recent dependency upgrades can surface the root cause before developers notice performance degradation.

Action

Insights are closed the loop through explicit tickets, chat‑ops notifications, or agenda items in regular ceremonies. The key is to assign owners and due dates so that feedback does not remain abstract.

Below is a simplified architecture diagram expressed in pseudo‑code to illustrate how these layers interact. The code is intentionally small to avoid large inline blocks.


# Pseudo‑code for a feedback aggregation service
import kafka
import prometheus_client
import gitlab

def collect_events():
    git_events = gitlab.fetch_merge_requests()
    ci_events = kafka.consume('ci-results')
    metrics = prometheus_client.query('http_request_duration_seconds')
    return git_events, ci_events, metrics

def analyze(git_events, ci_events, metrics):
    slow_builds = [e for e in ci_events if e['duration'] > 600]
    latency_spikes = [m for m in metrics if m['value'] > 0.5]
    return slow_builds, latency_spikes

def dispatch_actions(slow_builds, latency_spikes):
    for build in slow_builds:
    create_issue(build['pipeline_id'], "Investigate slow build")
    for spike in latency_spikes:
    send_slack_notification(spike['service'], "Latency exceeds SLO")

if __name__ == "__main__":
    git, ci, mt = collect_events()
    sb, ls = analyze(git, ci, mt)
    dispatch_actions(sb, ls)

The service continuously ingests data, runs lightweight analytics, and creates actionable tickets. By automating the “analysis” and “action” steps, engineering leadership frees up human reviewers to focus on higher‑order strategic decisions.

Embedding Feedback in Daily Rituals

Even the most sophisticated tooling fails without cultural adoption. The following set of rituals embeds feedback in the natural rhythm of an engineering team.

1. Pair Programming Sessions

Real time peer review provides immediate, context‑rich feedback. Teams that schedule regular pairing see a measurable reduction in post‑release defects. Notable case study is a fintech platform that introduced a mandatory 20 percent pairing rule and defect density dropped by 25 percent within six months.

2. Structured Pull Request Reviews

Reviewers follow a checklist that covers functional correctness, performance impact, security considerations, and documentation completeness. The checklist is stored as a markdown file in the repository and rendered automatically in the PR UI. This standardization reduces reviewer fatigue and ensures critical aspects are not overlooked.

3. Sprint Retrospective with Action Tracking

Retrospectives generate a list of improvement items. Engineering leadership records each item in a dedicated “retro‑actions” board, assigns owners, and reviews progress at the start of the next sprint. This habit converts vague sentiment into concrete change.

4. Operational Incident Postmortems

After a production incident, a blameless postmortem is conducted. The outcome includes a timeline, root cause analysis, and a set of remediation tickets. The remediation tickets are linked back to the original incident for traceability, and the postmortem summary is shared across all engineering squads to propagate learning.

5. Career Development One on Ones

Managers use a structured agenda that covers recent achievements, skill gaps, and upcoming stretch goals. Feedback is documented in the employee’s growth plan, which is revisited every quarter. This practice aligns personal development with the team’s technical roadmap.

By integrating feedback into these recurring activities, the organization creates a rhythm where learning is continuous rather than episodic.

Real World Example: Scaling Feedback in a Multi‑Team Organization

Global e‑commerce company grew from a single five‑person back end team to twelve cross‑functional squads distributed across three continents. Early attempts to standardize feedback relied on a central “engineering excellence” group that manually audited code reviews and postmortems. The approach quickly became a bottleneck and caused resentment among developers who felt micromanaged.

The leadership pivoted to a decentralized model built on the feedback taxonomy described earlier. Each squad adopted the following pattern:

– Local Feedback Champions: Senior engineers who own the health of the code review process within their squad. They ensure that the review checklist is up to date and mentor newer members.

– Automated Quality Gates: CI pipelines enforce static analysis, test coverage thresholds, and performance budgets. Violations automatically block merges, turning quality feedback into an immutable gate.

– Cross‑Team Metrics Dashboard: Shared Grafana dashboard aggregates latency, error rates, and deployment frequency across all squads. Alerts are routed to a dedicated “site reliability” channel that includes representatives from each team.

– Quarterly “Effectiveness” Review: Engineering leadership hosts a forum where each squad presents its retrospective actions, metric trends, and upcoming challenges. The forum is recorded and indexed for future reference.

Within nine months the organization measured a 40 percent increase in deployment frequency, 30 percent drop in rollback rate, and a 50 percent improvement in employee net promoter score. The case demonstrates that well designed feedback loops, when empowered at the team level, scale without overwhelming central governance.

Metrics that Reveal Team Effectiveness

Quantitative signals help verify whether feedback loops are delivering value. The following metrics are commonly tracked by engineering leaders.

Metric	What It Indicates	Typical Target
Lead Time for Changes	Speed from code commit to production	Under 24 hours for high priority work
Change Failure Rate	Percentage of deployments that cause incidents	Below 5 percent
Mean Time to Recovery	Time to restore service after an incident	Under 30 minutes for critical services
Review Cycle Time	Duration between PR opening and merge	Less than 12 hours for most PRs
Team Sentiment Score	Aggregated result from pulse surveys	Above 7 on a 10 point scale

When any metric deviates from its target, the associated feedback loop should be examined for gaps. For example, a rising review cycle time often points to unclear review ownership or overloaded reviewers, prompting an adjustment in the peer review process.

Practical Tips for Engineering Leaders to Strengthen Feedback Loops

– Automate repetitive feedback. Use bots to comment on PRs when test coverage falls below the configured threshold. Github copilot can do initial PR review followed by senior engineer.
– Keep feedback specific and data‑driven. Replace vague statements such as “code looks messy” with concrete observations like “function X exceeds 30 lines and lacks unit tests.”
– Close the loop quickly. Assign a ticket owner at the moment feedback is received and set a short due date.
– Celebrate improvements publicly. When a team reduces its deployment lead time, share the achievement in the company newsletter to reinforce positive behavior.
– Rotate feedback champions regularly to avoid expertise silos and to spread best practices across squads.
– Align feedback with business outcomes. Tie metric improvements to revenue or customer satisfaction goals so that engineers see the larger impact of their actions.

Integrating Feedback with Team Management Practices

Team management is not limited to staffing decisions – it also encompasses the orchestration of information flow. Effective engineering managers act as conduit between raw data and strategic action. They accomplish this by

1. Curating the most relevant signals for each engineer. Junior contributors receive detailed code review comments, while senior staff get high‑level trend analysis that informs architectural decisions.

2. Providing coaching that translates feedback into skill development. If a developer repeatedly receives comments about missing error handling, the manager arranges a focused learning session on defensive programming.

3. Balancing short term performance pressure with long term learning. Managers protect time for engineers to work on technical debt reduction, recognizing that this investment improves future feedback quality.

By embedding feedback awareness into the everyday responsibilities of team managers, the organization creates a culture where learning and performance are inseparable.

The Role of Psychological Safety in Feedback Loops

Even the most advanced tooling cannot compensate for a team that feels unsafe to speak up. Psychological safety is the belief that one can raise concerns, admit mistakes, and propose ideas without fear of retribution. Organizations that nurture safety see higher rates of knowledge sharing and faster error correction. Practical actions to foster safety include

– Explicitly stating at the start of every meeting that all perspectives are valued.
– Normalizing “I don’t know” statements by responding with curiosity rather than judgment.
– Using anonymous feedback channels for sensitive topics, then surfacing the aggregated insights in a transparent manner.

When safety is established, feedback loops become richer, more honest, and ultimately more effective.

Case Study: Feedback‑Driven Transformation at a Cloud Services Provider

Cloud services provider faced recurring latency spikes during peak traffic periods. Initial postmortems identified infrastructure bottlenecks but failed to prevent recurrence. Leadership decided to redesign the feedback architecture by adding a “real‑time latency alert” channel that posted directly to the responsible team’s chat room, including a link to the offending request trace.

Simultaneously, the engineering leadership introduced a “latency champion” role rotating among senior engineers. The champion reviewed each alert, determined whether it required a code change, configuration tweak, or capacity adjustment, and then logged an actionable ticket. Over a six month period the average latency variance reduced from 35 percent to under 5 percent, and the team’s confidence in handling load spikes increased dramatically.

Key lessons extracted from this transformation:

– Immediate, actionable alerts close the feedback loop before the problem escalates.
– Dedicated ownership ensures that every signal is investigated and resolved.
– Rotating responsibility distributes knowledge and prevents burnout.

Future Directions: AI‑Enhanced Feedback Loops

Artificial intelligence is beginning to augment traditional feedback mechanisms. Large language models can automatically generate code review comments, suggest test cases, and summarize incident reports. Predictive models can forecast the impact of a proposed change on system stability based on historical data. While these technologies are still emerging, early adopters report a reduction in manual effort and an increase in the consistency of feedback.

Engineers should approach AI‑enhanced tools as assistants rather than replacements. Human judgment remains essential for contextualizing suggestions, prioritizing actions, and maintaining the trust that underlies psychological safety.

Conclusion

Team effectiveness is the product of clear purpose, transparent processes, and disciplined feedback loops. Engineering leadership that invests in a well‑designed feedback infrastructure-combining automated data collection, rigorous analysis, and decisive action-creates an environment where continuous improvement is the norm. Real world examples from e‑commerce, fintech, and cloud services illustrate that scaling feedback does not require a central bureaucracy; instead, empowerment of local champions, automation of quality gates, and transparent metric sharing drive sustainable growth. By measuring key performance indicators, nurturing psychological safety, and embracing emerging AI assistance, organizations can keep their engineering teams adaptable, resilient, and aligned with strategic business goals. The result is an effective engineering team that not only delivers faster and more reliably but also cultivates a culture of learning that propels long term success.

Developer’s Guide to Resilience4j Retry

February 28, 2026

In modern distributed systems the need to tolerate transient failures is a fundamental design requirement. Network latency spikes, temporary service outages, rate‑limited third‑party APIs and occasional database deadlocks are all examples of conditions that can be mitigated by retrying the failed operation instead of aborting the request outright. The Resilience4j library offers a lightweight, functional approach to implementing fault‑tolerance patterns in Java applications. Among its modules, resilience4j-retry stands out as a focused solution for encapsulating retry logic while keeping configuration explicit and testable.

This guide delves deeply into the inner workings of the retry module, explains how to configure it for a wide variety of real‑world scenarios, and demonstrates integration techniques for plain Java, Spring Boot, and reactive stacks. The content is intended for experienced developers and architects who already understand basic resilience concepts and are looking for a production‑ready, code‑centric reference.

Why a Dedicated Retry Module Matters

Retry is deceptively simple when expressed as a single ‘while’ loop, but production code must address several non‑obvious concerns:

1. Determining the exact set of exceptions that merit a retry versus those that indicate unrecoverable errors.
2. Configuring the number of attempts, wait intervals, and back‑off strategies in a way that respects service level agreements.
3. Recording metrics for monitoring, alerting and capacity planning.
4. Ensuring that retries do not introduce resource contention, especially in thread‑pooled environments.
5. Providing a clear separation between business logic and resilience concerns for maintainability and testability.

Resilience4j isolates these aspects into strongly typed configuration objects, immutable registries and functional wrappers, enabling developers to reason about the behavior of a retry in isolation from the rest of the code base.

Core Concepts of resilience4j‑retry

The retry module revolves around three primary types: ‘RetryConfig’, ‘RetryRegistry’ and ‘Retry’. Understanding each component is essential before proceeding to integration.

RetryConfig
‘RetryConfig’ is an immutable holder for all parameters that define the retry policy. It includes the maximum number of attempts, the wait duration between attempts, the exception predicates and optional interval functions for custom back‑off. Because the configuration is immutable, it can be safely shared across threads without additional synchronization.

RetryRegistry
‘RetryRegistry’ acts as a factory and container for ‘Retry’ instances. It can be supplied with a default ‘RetryConfig’ that will be applied to any retry created without an explicit configuration. The registry also facilitates runtime changes through its management APIs, allowing operational teams to tune retry behavior without redeploying the application.

Retry

‘Retry’ is the concrete executable element that decorates a functional interface such as ‘Supplier’ or ‘Callable’. When the decorated operation throws an exception that matches the configured predicate, the ‘Retry’ will re‑invoke the operation according to the defined wait strategy. The retry object also exposes events that can be hooked into for logging or metrics collection.

All three classes follow a fluent builder pattern, which makes creating expressive configurations concise and readable.

Creating a Basic Retry Instance

Before moving to complex integrations, a minimal example illustrates the essential steps.

			
import io.github.resilience4j.retry.Retry;
import io.github.resilience4j.retry.RetryConfig;
import java.time.Duration;
import java.util.function.Supplier;
public class SimpleRetryDemo {
    public static void main(String[] args) {
        RetryConfig config = RetryConfig.custom()
                .maxAttempts(4)
                .waitDuration(Duration.ofMillis(200))
                .retryExceptions(RuntimeException.class)
                .build();
        Retry retry = Retry.of("simpleRetry", config);
        Supplier<String> unreliableService = () -> {
            System.out.println("Attempting operation");
            if (Math.random() < 0.75) {
                throw new RuntimeException("Transient failure");
            }
            return "Success";
        };
        Supplier<String> retryingSupplier = Retry.decorateSupplier(retry, unreliableService);
        try {
            String result = retryingSupplier.get();
            System.out.println("Result: " + result);
        } catch (Exception e) {
            System.out.println("All attempts failed: " + e.getMessage());
        }
    }
}

		

The code constructs a ‘RetryConfig’ that permits three retries after the initial attempt, each spaced 200 milliseconds apart. The ‘retryExceptions’ predicate tells the engine to treat any ‘RuntimeException’ as retryable. The ‘Retry.of’ call creates a named retry instance that can later be looked up from a registry. Finally, the business logic ‘unreliableService’ is wrapped using ‘Retry.decorateSupplier’, yielding a new supplier that adheres to the configured policy.

Running the program multiple times demonstrates how the same operation can eventually succeed or ultimately fail after exhausting the attempts. This deterministic behavior is the cornerstone for more elaborate scenarios.

Configuring Advanced Back‑off Strategies

Simple fixed‑interval retries often suffice for quick internal calls, but external APIs may impose stricter rate limits. Resilience4j supports custom interval functions, enabling exponential back‑off, jitter, or even deterministic sequences.

The ‘IntervalFunction’ class provides a fluent factory for common patterns:

– ‘ofExponentialBackoff(initial, multiplier)’ produces an exponential series where each wait is multiplied by the given factor.
– ‘ofExponentialRandomBackoff(initial, multiplier, randomFactor)’ adds a random jitter to the exponential series, mitigating thundering‑herd problems.
– ‘ofUniformRandom(initial, maxDelay)’ creates a uniformly distributed random delay between the initial and maximum values.

Configuring an exponential back‑off with jitter looks like this:

			
import io.github.resilience4j.retry.IntervalFunction;
RetryConfig config = RetryConfig.custom()  
    .maxAttempts(6)  
    .intervalFunction(IntervalFunction.ofExponentialRandomBackoff(  
        Duration.ofMillis(100),  
        2.0,  
        0.5))  
    .retryOnResult(response -> response == null)  
    .build();  

		

In this snippet the initial wait is 100 ms, each subsequent wait doubles, and a ±50 % random factor is applied to each interval. The ‘retryOnResult’ predicate demonstrates that retries can also be triggered by undesirable return values, such as a null response from a cache lookup.

Integration with Spring Boot

Spring Boot developers benefit from auto‑configuration support that reduces boilerplate. By adding the ‘resilience4j-spring-boot2’ dependency, configuration can be expressed in ‘application.yml’ or ‘application.properties’. The framework automatically creates beans for each retry defined under the ‘resilience4j.retry’ namespace.

Typical YAML configuration for a retry named ‘externalApi’ appears as follows:

resilience4j: retry: instances: externalApi: max-attempts: 5 wait-duration: 300ms exponential-backoff-multiplier: 2.0 exponential-backoff-max-delay: 5s retry-exceptions: - java.io.IOException - org.springframework.web.client.HttpServerErrorException

After declaring the configuration, a Spring service can inject the ‘Retry’ bean directly or use the functional decorator on a method reference. The latter approach keeps the original business method untouched.

			
@Service  
public class ExternalApiService {
    private final RestTemplate restTemplate;  
    private final Retry externalApiRetry;
    public ExternalApiService(RestTemplate restTemplate,  
                               @Qualifier("externalApi") Retry externalApiRetry) {  
        this.restTemplate = restTemplate;  
        this.externalApiRetry = externalApiRetry;  
    }
    public String fetchData(String id) {  
        Supplier<String> request = () -> restTemplate.getForObject(  
            "https://api.example.com/data/{id}", String.class, id);
        Supplier<String> retryingRequest = Retry.decorateSupplier(externalApiRetry, request);  
        return retryingRequest.get();  
    }  
}

		

The ‘@Qualifier’ annotation selects the retry instance by name, matching the key defined in the YAML file. Spring’s lifecycle management ensures that the retry object is a singleton, and any changes to the configuration file are reflected after a refresh when using Spring Cloud Config.

Reactive Integration with WebFlux

Reactive applications demand non‑blocking retries that respect back‑pressure. Resilience4j supplies a ‘RetryOperator’ for Project Reactor types. The operator is applied via the ‘transform’ method on a ‘Mono’ or ‘Flux’.

			
import reactor.core.publisher.Mono;  
import io.github.resilience4j.retry.RetryOperator;  
import io.github.resilience4j.retry.Retry;  
import java.time.Duration;
Retry retry = Retry.of("reactiveRetry",  
    RetryConfig.custom()  
        .maxAttempts(3)  
        .waitDuration(Duration.ofMillis(150))  
        .build());
Mono<String> reactiveCall = webClient.get()  
    .uri("/resource")  
    .retrieve()  
    .bodyToMono(String.class)  
    .transform(RetryOperator.of(retry));  

		

The ‘RetryOperator’ intercepts error signals and re‑subscribes according to the retry policy. Because the operator is built on Reactor’s scheduler, the wait periods are executed asynchronously, preserving the non‑blocking nature of the pipeline.

Monitoring and Metrics Collection

Visibility into retry behavior is essential for operators to detect misconfiguration or downstream service degradation. Resilience4j integrates seamlessly with Micrometer, providing counters for successful calls, retries, and failed attempts. When a ‘Retry’ is created, it automatically registers the following metrics:

– ‘retry.calls’ – total number of attempts.
– ‘retry.calls.successful’ – attempts that completed without triggering a retry.
– ‘retry.calls.failed’ – attempts that exhausted all retries.
– ‘retry.calls.retried’ – number of retries performed.

These metrics can be exposed to Prometheus, Grafana or any other monitoring stack supported by Micrometer. The code required to enable metrics is minimal:

			
import io.github.resilience4j.micrometer.tagged.MeterRegistryRetryMetrics;  
import io.micrometer.core.instrument.MeterRegistry;
MeterRegistry registry = ...; // Obtain from Spring or manual setup  
Retry retry = Retry.of("metricsRetry", RetryConfig.ofDefaults());
MeterRegistryRetryMetrics.ofRetryRegistry(registry, RetryRegistry.ofDefaults());  

		

Once registered, each retry instance contributes its own metric series identified by the retry name tag. Alert thresholds can be defined based on the ratio of ‘retry.calls.retried’ to ‘retry.calls.successful’, signalling when a service’s reliability is deteriorating.

Testing Retry Logic

Unit testing retry behavior is straightforward thanks to the deterministic nature of the configuration objects. Common pattern is to use a ‘Supplier’ that counts invocations and throws a controlled exception for the first N calls.

			
class CountingSupplier implements Supplier<String> {
    private int count = 0;
    private final int failUntil;
    public CountingSupplier(int failUntil) {
        this.failUntil = failUntil;
    }
    @Override
    public String get() {
        count++;
        if (count <= failUntil) {
            throw new IllegalStateException("fail");
        }
        return "ok";
    }
    public int getCount() {
        return count;
    }
}
@Test
void shouldRetryThreeTimes() {
    CountingSupplier supplier = new CountingSupplier(3);
    Retry retry = Retry.of("testRetry", RetryConfig.custom()
            .maxAttempts(5)
            .waitDuration(Duration.ZERO)
            .retryExceptions(IllegalStateException.class)
            .build());
    Supplier<String> decorated = Retry.decorateSupplier(retry, supplier);
    String result = decorated.get();
    assertEquals("ok", result);
    assertEquals(4, supplier.getCount()); // initial + three retries
}

		

The test sets a zero wait duration to keep execution fast, verifies that the final value is returned after the expected number of attempts, and ensures that the underlying supplier was invoked the correct number of times. Integration tests can also be built around Spring’s ‘@SpringBootTest’ with a mock ‘RestTemplate’ that mimics intermittent failures, confirming that the retry configuration defined in ‘application.yml’ behaves as intended.

Common Pitfalls and How to Avoid Them

Even experienced engineers occasionally introduce subtle bugs when applying retries. The most frequent issues include:

Retrying non‑idempotent operations such as monetary transfers or state‑changing POST requests. The remedy is to wrap only idempotent calls or to employ compensating transactions.
Configuring an excessive maximum attempt count together with long back‑off intervals, leading to thread starvation or request timeouts. Calculating the worst‑case latency by multiplying attempts by wait duration helps bound the total execution time.
Ignoring exception hierarchy and unintentionally retrying on fatal exceptions such as ‘OutOfMemoryError’. Filtering with ‘retryExceptions’ and ‘ignoreExceptions’ predicates prevents this.
Placing retry logic at the wrong abstraction level, for example wrapping a high‑level service that already includes its own retry. Consolidating retry policy at the boundary of external calls reduces duplication.
Forgetting to propagate the retry context in asynchronous pipelines, which can cause metrics to be lost. Using the provided Reactor or RxJava operators ensures the context is maintained.

By reviewing these scenarios during design reviews, teams can embed resilience without compromising correctness.

Performance Considerations

Retry adds latency by design, but its impact on CPU and memory is minimal because the library relies on immutable objects and avoids reflection. The primary performance factor is the thread pool used for waiting. When the wait duration is small, retries execute on the calling thread, which may increase CPU consumption if many threads are blocked on retries. For larger delays, Resilience4j schedules the next attempt on a shared scheduler, relieving the original thread.

When integrating with reactive stacks, the non‑blocking ‘RetryOperator’ leverages Reactor’s scheduler pool, making it safe for high‑throughput pipelines. However, each retry still consumes a small amount of heap for the internal ‘RetryContext’. Profiling applications under load can confirm that the overhead stays well below 1 % of total memory usage.

Comparing Retry Configurations

Below is an HTML table that contrasts three typical retry policies used in production environments. The comparison highlights how each configuration addresses latency, resource usage and failure tolerance.

Policy Name	Max Attempts	Base Wait	Back‑off Type	Typical Use Case
Short‑Circuit	2	50 ms	Fixed	Internal cache miss where latency budget is sub‑second
Exponential‑Jitter	5	200 ms	Exponential with 0.5 random factor	Third‑party REST API with rate limits
Graceful‑Drain	8	1 s	Exponential up to 30 s	Database connection recovery during rolling upgrades

The table demonstrates that a policy with a larger number of attempts and longer base waits is suitable for operations where eventual success is more valuable than immediate response time, such as during maintenance windows.

Migration from Other Retry Libraries

Many legacy projects use the Spring Retry library or custom ‘while’ loops. Moving to Resilience4j yields benefits such as functional decorators, event publishing and metric integration. The migration path typically involves three steps:

Because Resilience4j does not interfere with the underlying business code, the migration can be performed incrementally, module by module, while maintaining full test coverage.

1. Replace the old annotation or loop with a ‘Retry’ instance created from a ‘RetryConfig’ that mirrors the previous settings.
2. Substitute the call site with ‘Retry.decorateSupplier’, ‘decorateCallable’ or the appropriate Reactor operator.
3. Hook Spring events or custom listeners into the ‘Retry’s event publisher if business logic depends on side effects.

Advanced Topics

Interval Function Extensibility – Developers can implement the ‘IntervalFunction’ interface to provide domain‑specific delay calculation, such as consulting a dynamic configuration service for back‑off parameters.
Retry Context Propagation – In multi‑threaded environments, the ‘Retry’ object stores a ‘RetryContext’ that can be accessed through ‘Retry.getContext()’. Propagating this context across thread boundaries enables correlated logging, where each retry attempt carries the same request identifier.
Event Driven Compensation – By subscribing to the ‘onRetry’ event, an application can trigger side‑effects such as sending a diagnostic message or updating a circuit‑breaker state, creating a richer resilience ecosystem.
Combining with Rate Limiter – Pairing a ‘Retry’ with a ‘RateLimiter’ provides protection against rapid retry storms. The rate limiter enforces a maximum request rate, while the retry policy dictates how many additional attempts are allowed.

These capabilities illustrate how the retry module can serve as a building block for sophisticated resilience architectures.

Conclusion

Implementing retries correctly is a cornerstone of robust microservice design. Resilience4j‑retry delivers a concise, immutable configuration model, a set of functional decorators for both imperative and reactive code, and out‑of‑the‑box integration with Spring Boot and Micrometer. By mastering the core concepts ‘RetryConfig’, ‘RetryRegistry’ and ‘Retry’ and applying best practices around back‑off strategies, exception filtering and metrics, developers can safeguard their applications against transient failures without sacrificing performance or clarity.

Real‑world examples, from HTTP client wrappers to database reconnection loops, demonstrate that the library scales from simple command‑line tools to large‑scale cloud‑native services. Careful attention to idempotency, resource consumption and monitoring ensures that retries remain a benefit rather than a hidden source of latency.

With the knowledge provided in this guide, engineering teams are equipped to adopt a disciplined, observable, and testable retry strategy that aligns with modern DevOps expectations and keeps systems resilient in the face of inevitable network and service disruptions.

Software Development and Security

December 31, 2025

I’ve been thinking about security and how frequent security lapses put all of us on edge. My personal information has appeared multiple times on Have I Been Pawned, and it’s incredibly frustrating especially knowing that many of these breaches happen at billion-dollar companies running multi million-dollar projects with teams of highly skilled professionals working around the clock. Despite having significant resources and expertise, these organizations still experience major data breaches that expose our personal information. Why does this keep happening ?

Generally, companies don’t rely on a single control or tool for security. Instead, they use a “defense-in-depth model, meaning multiple layers of protection are applied across people, processes, infrastructure, networks, and applications. The goal is that if one layer fails, others still reduce or contain the risk.

Most mature Companies manage security through a combination of

Policies & Governance – security standards, risk management, compliance (ISO 27001, SOC2, HIPAA, PCI-DSS, etc.).
Secure SDLC / DevSecOps – security embedded into every stage of development (design –> coding –> testing –> deployment –> operations).
Security Teams and Roles
AppSec engineers
Security architects
SOC / monitoring teams
Red teams / penetration testers
Automation & Tooling – scanning, monitoring, logging, incident response systems.
Training and Awareness for developers with secure-coding training, phishing simulations, insider-threat prevention etc.

We often say security is treated as a continuous lifecycle or moving goal, not a one-time control or activity.

There are often more than 5 to 10 layers of defense which companies implement in order to ensure that security is not compromised and they are often implemented at

– Physical and Infrastructure Security

Data center security, access controls, CCTV, badges
Cloud provider infrastructure controls

– Network Security

Firewalls, VPNs, security groups.
Network segmentation / zero-trust networks
Intrusion detection & prevention (IDS/IPS)

– Host / Endpoint Security

OS hardening
EDR / anti-malware
Patch and vulnerability management

– Application Layer Security

Secure coding practices (OWASP Top 10)
Static and dynamic code scanning (SAST / DAST)
Dependency / supply-chain scanning (SCA)
Penetration testing & bug bounty programs

– Identity & Access Control

Authentication and MFA
Least-privilege access Role-based access control (RBAC)
Secrets and key management

– Data Security

Encryption at rest and in transit
Data classification and masking
Backup and recovery

– API and Service Security

API gateways and rate limiting
mTLS, OAuth, JWT validation
Abuse and bot protection

– Monitoring and Detection

SIEM / log monitoring
Threat intelligence feeds
Behavior analytics & anomaly detection

– Incident Response and Recovery

Playbooks and response plans
Forensics and containment
Post-incident learning and improvements

– People and Process Controls

Security training & awareness
Insider-threat prevention
Change management and audits

In addition to these companies also try to or at least try to mix and adopt DevSecOps and Open Worldwide Application Security Project (OWASP) principles in the development life cycles.

So even having these many layers of defense’s we still see the security issues. Why is that so ??

Over time, both agile and traditional software development processes have tended to emphasize features, speed, and delivery timelines over security. In many organizations even those investing millions of dollars and employing large teams security still ends up as a low-priority task addressed late in the project, or in some cases, not addressed at all. Teams often assume that multiple external layers of defense will protect them, reinforcing a mindset rooted in earlier engineering practices where functionality and business value were treated as the primary objectives, while security was viewed as an operational or infrastructure concern to be handled later.

Product owners and business leaders almost always prioritize customer-visible features and time-to-market because those outcomes directly drive revenue, competitive advantage, and executive performance metrics. Security, on the other hand, is usually viewed as expense rather than a value , especially when the benefits are invisible unless something goes wrong. This creates a trade-off environment where teams feel pressure to ship features quickly, sometimes bypassing security reviews, technical debt cleanup, or risk assessments in order to hit deadlines or launch windows.

Nearly all modern software is built from many interconnected components, with applications relying heavily on third-party libraries and frameworks to accelerate development and add functionality. However, these dependencies often introduce security vulnerabilities that can cascade into serious risks for the overall system, even if the application code itself is secure. In many organizations, remediation of these vulnerabilities is delayed or deprioritized because teams are under constant timeline pressure, fear that upgrades may introduce regressions, or classify the fixes as “technical debt” to be addressed later. As a result, known security issues can remain unresolved in production for long periods of time, increasing exposure and making dependency management and timely patching a critical yet frequently neglected part of application security.

Now that we understand, at a high level, how organizations implement security, it’s clear that security cannot exist as a siloed phase in the lifecycle. Instead, it needs to be integrated seamlessly into the SDLC, functioning as a continuous and measurable quality attribute throughout the development process. In this context, DevSecOps provides a strong foundation, as it embeds security practices directly into development and operations rather than treating them as an afterthought. Some of the ways we can integrate security into SDLC is via

Integrating Security into SDLC Process

SDLC Phase	Security Activity (OWASP Alignment)	Outcome/Artifact
Requirements	Define security requirements and non-functional requirements (e.g., must support MFA, must protect PII).	Security Requirements Document
Design	Threat Modeling (focused on Insecure Design). Review architecture against OWASP principles (e.g., Least Privilege).	Threat Model Report/Data Flow Diagram
Development	Use secure coding practices, integrated SAST/SCA in IDE, use OWASP Cheat Sheets.	Secure Code & Clean SAST/SCA Scan
Testing/QA	Dynamic Application Security Testing (DAST) and Penetration Testing (check for OWASP Top 10 risks).	Security Test Report/Pentest Findings
Deployment	Secure Configuration Management (Security Misconfiguration) and continuous security monitoring.	Hardened Environment/Configuration Baseline

Embedding in Agile/Scrum Planning

Security Stories in Backlog: Create security user stories or Security Epics that address specific risks or OWASP risks (e.g., “As a user, I should not be able to bypass access controls to view another user’s account details.”). This ensures security work is prioritized and tracked.
Sprint Planning:- Dedicate a portion of every sprint to security, often as a spike for threat modeling a new feature or as a task to remediate high-priority security defects from automated scans.
Definition of Done (DoD):- Security must be part of the DoD. Feature is not complete until it passes the security checks, which should include “Feature has been threat modeled,” and “Secure code review completed.”
Retrospectives:- Review security incidents or near-misses during the sprint retrospective to identify root causes and improve the secure development process continuously.
Every sprint should proactively review whether any dependencies contain security-related vulnerabilities and plan remediation work as part of the sprint, rather than deferring everything into a single large ticket later. Integrating dependency risk assessment into the regular sprint cycle ensures that vulnerabilities are addressed incrementally and consistently, instead of accumulating as unmanaged technical debt.

So, the next time we run into a security issue, instead of simply logging it as another task, what if we pause and ask our product and technology leaders a deeper and meaningful question

Is this just a backlog item or that our approach to security needs to change ?

With hope that this question might spark a much more meaningful conversation about risk, priorities, and how seriously we treat security in the lifecycle.

I believe the very definition of security will evolve in the era of AI, and the way we approach it will fundamentally change. As AI becomes more advanced and fully mainstream, a significant portion of our work will shift toward identifying, managing, and mitigating AI-driven threats. We’ll increasingly face challenges such as deepfakes, AI-generated voice agents, and synthetic videos that convincingly mimic real users and legitimate interactions. In this future, security won’t just be about protecting systems or data it will also be about protecting identity, authenticity, and trust in a world where what we see and hear can no longer be taken at face value.

Understanding the Machine Learning System Interdependencies, Dynamics, and Failures

November 7, 2025
Machine Learning (ML) system is an integrated computing environment composed of three fundamental components:
- Data that guides algorithmic behavior,
- Learning algorithms that extract patterns from this data, and
- Computing infrastructure that enables both the learning process (training) and the application of learned knowledge (inference or serving).
Together, these components form a dynamic ecosystem capable of making predictions, generating content, or taking autonomous actions based on learned patterns. Unlike traditional software systems, which rely on explicitly programmed logic, ML systems derive behavior from data and adapt over time through iterative learning processes. Understanding their architecture and interdependencies is essential to designing, operating, and maintaining reliable AI driven applications.

At the core of every ML system lies a triangular dependency among Models/Algorithms, Data, and Computing Infrastructure framework often referred to as the AI Triangle. Each of these components plays a distinct role while simultaneously shaping and constraining the others.
- Algorithms (Models) :- Mathematical frameworks and optimization methods that learn patterns or relationships within data to make predictions, classifications, or decisions.
- Data:- The lifeblood of ML systems comprising the processes, storage mechanisms, and management tools for collecting, cleaning, transforming, and serving information for both training and inference.
- Computing Infrastructure:- The hardware and software stack that powers the training, deployment, and operation of machine learning models at scale. This includes GPUs/TPUs, distributed computing clusters, data pipelines, and orchestration frameworks.
These three elements interact in a feedback loop. The model architecture determines computational requirements (such as GPU memory or parallel processing) and influences how much and what kind of data is necessary for effective learning. The volume, quality, and complexity of available data, in turn, constrain which model architectures can be effectively trained. Finally, the capabilities of the computing infrastructure its storage, networking, and compute capacity set practical limits on both the data scale and model complexity that can be supported.

In essence, no component operates in isolation. Algorithms require data and compute power to learn and large datasets need algorithms and infrastructure to extract value and infrastructure serves no purpose without the models and data it is designed to support. Effective system design thus requires balancing these interdependencies to achieve optimal performance, cost efficiency, and operational feasibility.

While both ML systems and traditional software rely on code and computation, their failure modes differ fundamentally. Traditional software follows deterministic logic when a bug occurs, the program crashes, error messages appear, and monitoring systems raise alerts. Failures are explicit and observable. Developers can pinpoint the root cause, fix the defect, and redeploy the corrected version.

Machine learning systems, however, exhibit implicit and often invisible degradation. ML system can continue to operate serving predictions and producing outputs while its underlying performance silently deteriorates. The algorithms keep running, and the infrastructure remains functional, yet the system’s predictive accuracy or contextual relevance declines. Because there are no explicit errors, standard software monitoring tools fail to detect the problem.

This distinction highlights why ML engineering requires a new class of observability and monitoring frameworks focused on data quality, model drift, and performance metrics rather than system uptime or error logs. ML systems demand continuous evaluation and retraining to maintain alignment with real-world conditions.

Autonomous vehicle’s perception system vividly illustrates this contrast. In traditional automotive software, the engine control unit either manages fuel injection correctly or raises diagnostic warnings. Failures are binary and immediately observable.

In contrast, an ML based perception model may experience gradual, unobserved performance decline. Suppose the model detects pedestrians with 95% accuracy during its initial deployment. Over time, as environmental conditions change seasonal lighting variations, new clothing styles, or weather patterns underrepresented in the training data the detection accuracy may drop to 85%. The vehicle continues to operate, and from the outside, the system appears stable. Yet, the subtle degradation introduces growing safety risks that remain invisible to conventional logging systems.

This silent failure mode where the system remains functional but less reliable is emblematic of ML engineering challenges. Only through systematic data auditing, reevaluation, and retraining can engineers detect and mitigate such degradation before it leads to unacceptable risk.

The phenomenon of silent degradation affects all three components of the AI Triangle simultaneously:
- Data Drift:- Over time, real world data distributions change. User behavior evolves, new edge cases emerge, and external factors such as seasonality or market shifts alter input patterns. The training data, once representative, becomes outdated.
- Algorithmic Staleness:- Models trained on past data continue to make predictions as if the world hasn’t changed. Their learned parameters no longer reflect current realities, leading to diminishing accuracy and relevance.
- Infrastructure Reinforcement:- The computing infrastructure, built for reliability and throughput, continues serving predictions flawlessly even as those predictions grow increasingly inaccurate. High uptime and low latency metrics mask the underlying problem, amplifying the scale of degraded decision-making.
Practical example for this behavior is e-commerce recommendation system. Initially achieving 85% accuracy in predicting user preferences, it may drop to 60% within months as customer tastes evolve and new products enter the catalog. Despite this decline, the system continues generating recommendations, users still see suggestions, and operational metrics report 100% uptime. However, the system’s business value silently erodes classic case of training serving skew, where the distribution of data during training diverges from that during real-world inference.

The insights of Richard Sutton, a pioneer in artificial intelligence and reinforcement learning, shed light on why these dynamics persist. Sutton’s research, including his co-authored textbook Reinforcement Learning: An Introduction, fundamentally shaped how machines learn from trial-and-error mirroring how humans acquire skills through experience.

In 2024, Sutton and Andrew Barto received the ACM Turing Award, computing’s highest honor, for their contributions to adaptive learning systems. Sutton’s influential essay, The Bitter Lesson, distills seven decades of AI research into one powerful observation that general methods that leverage large-scale computation consistently outperform approaches based on manually encoded human expertise.

This principle explains why modern ML systems, despite their sophistication, remain dependent on vast computational and data resources and why their fragility often stems from overreliance on statistical learning rather than explicit human understanding. Sutton’s perspective underscores the trade-off at the heart of the AI Triangle as systems grow more general and data-driven, they become more capable but also opaquer and more vulnerable to unnoticed performance decay.

Designing resilient machine learning systems requires acknowledging and managing these interdependencies and failure modes. Successful engineering practices includes
- Data Monitoring and Validation:- Continuously track input distributions, data quality, and label accuracy. Detect and respond to shifts early using statistical drift detection tools.
- Model Performance Tracking:- Evaluate model accuracy, precision, recall, and fairness metrics in production using live data. Implement automated retraining pipelines.
- Infrastructure Observability:- Extend system health monitoring to include model health metrics, not just uptime or latency.
- Feedback Loops:- Incorporate user feedback and edge case analysis to keep models aligned with evolving conditions.
- Ethical and Safety Considerations:- Recognize that silent degradation can have real-world consequences especially in healthcare, finance, and autonomous systems.
The future of ML engineering will depend less on building ever larger models and more on developing self-aware systems that detect and adapt to their own degradation concept sometimes referred to as self-healing AI infrastructure.

So now we understand as why OpenAI needs government support to fund and expand its operation and it’s due to bitter lesson.
Skip Level Meetings for Managers of Manager

November 1, 2025
With over two decades of experience in technology-driven organizations, I’ve consistently observed that most companies regardless of industry tend to develop multiple layers of management across their business lines. However, in smaller organizations with fewer than 300 employees or less, these layers often flatten. It’s uncommon to see long tenured leaders managing many managers in such settings. Instead, leaders in smaller companies frequently take a hands-on approach writing code, building prototypes, or spending hours alongside junior engineers to solve technical challenges, regardless of the seniority of their title. They often balance both technical and people management responsibilities. In contrast, in large public organizations like major banks or fintech enterprises, the higher one moves in the hierarchy, the less direct interaction they tend to have with employees several levels below. These differences inspired me to reflect on and write about one particular role that embodies this shift the manager of managers.

Large organization often have multiple levels individual contributors (ICs, engineers, testers, designers), then first‐line managers (engineering managers, team leads) who directly supervise those ICs, and above them, managers of those managers (senior engineering managers, directors, portfolio leads). The manager of managers(MoM) is the role that sits above one or more first‐line managers, and often has responsibility for multiple teams, engineering managers, or product streams.

Why do we need managers of managers ?

Here are some of the core reasons:

Span and Complexity
As the organization grows, a senior leader cannot directly manage each individual engineer that span becomes too large and becomes ineffective. Manager of managers reduces span of control by delegating direct supervision to first‐line managers. The concept of span of control explains how many direct reports a manager can meaningfully lead.
Example: Suppose you have 8 teams of 8–12 engineers each (≈ 80–100 engineers). It would be unmanageable for a single manager to meet with each of those 80 engineers weekly and maintain quality coaching. Instead, you have 8 team leads (engineering managers) each managing ~10 engineers, and one senior engineering manager above them coordinating across teams, aligning strategy, budgeting, resource allocation, and so on.

Strategy to execution alignment
The manager of managers links strategic goals (from senior leadership) to the execution of multiple teams. They translate higher-level objectives into team-level targets, ensure cross-team coordination, manage dependencies, remove impediments that span team boundaries, and allocate resources between teams. They serve as a bridge between tactical work (by the teams) and macro-organizational objectives.

Example: The company decides to improve latency of a core service by 50 %. Teams A and B are responsible respectively for frontend and backend. The manager of managers works with both engineering managers to ensure their plans align, dependencies are identified (e.g., data model changes), and that the execution schedules sync.

Consistency, standardization, process, and culture
As you scale engineering, you need standard engineering practices, consistent processes (e.g., code reviews, CI/CD pipelines, deployment standards, quality metrics), architectural coherence, and a shared culture. This is often beyond the purview of a single team lead and requires oversight at the managerial layer above. Manager of managers ensures there is a coherent engineering function rather than dozens of siloed teams doing their own thing.

Developing managers and leadership pipeline
The manager of managers plays a key role in developing the engineering managers coaching them, helping them grow, providing leadership development, helping them build the right kind of team culture, helping them manage up and down. Without that layer, managers may end up isolated or repeating mistakes.
- Handling cross‐team issues and scaling blockers
  Many blockers in larger engineering orgs are cross‐team architectural decisions, platform choices, shared services, infrastructure, operations, organizational dynamics, budgeting, priority conflicts, resource tradeoffs, etc. Manager of managers is positioned to handle these broader issues. They can elevate issues to senior leadership or work across peers to resolve them.
Problems they solve :-
- Overload of individual contributor management: If a senior leader tried to manage all engineers directly, they’d be overwhelmed with 1:1s, escalations, personal development, performance reviews. The manager of managers alleviates this.
- Tactical focus misalignment: Without that middle managerial layer, senior leaders risk focusing too much on day-to-day rather than strategic view, and teams may drift in inconsistent directions.
- Knowledge silos and duplicate efforts: The senior manager of managers helps coordinate across teams, reduce duplication, enforce shared infrastructure, and spread best practices.
- Poor feedback flows / information bottlenecks: The manager of managers helps propagate information up and down, ensures leadership hears what’s happening on the ground, and ensures the ground hears what leadership expects.
- Weak leadership development: Without managers of managers, team leads may lack mentorship, miss leadership capability growth, and the organization may struggle to scale People/Leadership maturity.
Strengths of the manager of managers role
- Scale of impact: Manager of managers can influence dozens or hundreds of engineers (via the managers) rather than a single team. Their decisions and actions ripple across the org.
- Broader perspective: They see across teams, understand broader dependencies and systemic issues, and can optimize at the team of teams level.
- Leadership leverage: Their time is spent more on coaching and leadership rather than purely delivery tasks. they elevate managers, enabling the organization to be stronger overall.
- Strategic alignment: They can ensure strategic objectives are embedded into team plans and that teams are working toward common goals.
- Culture steward: They have the ability to influence engineering culture at scale e.g., standardizing practices, improving quality, impacting morale, removing toxic behaviors.
Weaknesses / potential pitfalls
- Distance from the work: As you climb up the hierarchy, you get further from the day-to-day work. There is risk of being out of touch with what engineers actually do or feel, leading to decisions that don’t match reality.
- Information distortion: With multiple layers, information may become filtered or sanitized; the manager of managers may rely heavily on inputs from their direct reports (engineering managers) and may miss what’s really going on.
- Loss of agility: Having more layers can slow decision-making, increase bureaucracy, and reduce responsiveness. The middle layer may become gatekeeping rather than enabling.
- Leadership vs. delivery tension: The manager of managers may get pulled into delivery or project tasks instead of maintaining leadership duties, thereby diluting their leverage. They might micromanage managers or teams, undermining them.
- Over-control or under-visibility: If a manager of managers intervenes too heavily, they risk undermining the autonomy of the engineering managers. If they intervene too little, they risk being invisible and losing influence.
- Burnout risk: They have to juggle many stakeholders, both upwards (senior leadership) and downwards (engineering managers and teams), while dealing with cross-team issues; the role can be high pressure.
Example –

You are Senior Engineering Manager overseeing three engineering managers (A, B, C), each with a team of 10 engineers working on micro-services. The organization’s goal for the quarter is to reduce service outages by 40%. As the manager of managers, your duties include:
- Working with A/B/C to ensure each team aligns a plan to improve resilience (e.g., automated chaos testing, better monitoring, faster rollback).
- Reviewing cross-team dependencies (e.g., shared service used by A and C’s teams) and negotiating resource allocations.
- Coaching A/B/C on how to lead their teams, manage risk, escalate effectively, build reliability culture.
- Holding skip‐level meetings (more on that later) with engineers in their teams to sense morale, culture, bottlenecks.
- Reporting up to the leadership about progress, risk, and resourcing, while translating senior leadership strategy into team-level objectives.
In doing so, you will ensure that the engineering organization doesn’t devolve into siloed teams but moves together.

Skip-Level Meetings

Now let’s dive into the practice of skip-level meetings what they are, why they’re important (especially for managers of managers), how to run them, their benefits, pitfalls, whom to invite, and best practices.

What are skip-level meetings?

Skip-level meeting is typically a 1:1 (or small group) meeting between a manager and an employee who reports not to them directly, but via one intermediate managerial layer. For example, a director meets with an individual contributor whose direct manager they supervise. These meetings “skip” the manager in between.

Skip-level meetings are typically semi-frequent meetings between staff who have a layer in the org‐chart separating them. Skip‐level meeting is a meeting where you, as a manager, meet one‐on‐one with the direct report of a manager who you manage.

Who needs to hold skip-level meetings ?
- Managers of managers (senior engineering managers, directors) who want visibility into what their teams are experiencing.
- Leaders who want to build trust and relationships beyond their direct reports.
- Organizations that are scaling and need to maintain connection between senior leadership and individual contributors.
- First-line managers may invite the next level down for broader cross-team discussion, but the core value is when leadership meets leaf nodes of the organization.
Why do skip-level meetings matter / what problems do they solve ?
1. Break down the “good-news cocoon” / “ivory tower”
  Senior leaders can become insulated and only hear filtered, positive information. Skip‐level meetings give access to raw, unfiltered feedback from the people who do the work.
Example: Engineer may have frustration with a process bottleneck that their manager doesn’t raise upward in a skip‐level meeting, the senior manager hears it and can act.
- Build rapport and trust
  ICs feel seen and valued when senior leaders make time for them. They perceive that leadership cares beyond just the manager.
Example: Engineer might feel their career progression is only seen by their manager. Skip meeting makes them feel their voice is heard further up.
- Improve communication and alignment
  Senior leaders can share vision, strategy, and context directly to the people doing the work, reducing misalignment and we don’t know why we’re doing this.
Example: Senior engineering manager can explain why reliability is a priority this quarter, so engineers in each team understand not just what but why.
- Detect emerging issues early
  Because you engage people further downstream, you can pick up morale issues, hidden blockers, manager performance problems, cross‐team friction, or other soft signals before they become big issues
Example: Several engineers mention repeated miscommunication in one team; senior leader hears this and coaches the team lead.
- Develop leadership visibility and pipeline
  It gives senior leaders insight into up-and-coming talent, and for employees to see leadership beyond their manager (important for their growth).
Example: Senior manager spots an engineer consistently raising smart suggestions in skip‐level and later sponsors them for a leadership development program.

How to do skip-level meetings when you are a manager of managers

Here are the steps and guidelines for doing it :-
1. Set intention and communicate it
  1. Tell your direct reports (the managers) you plan to hold skip‐level meetings. Frame it as support rather than monitoring them.
  1. Tell the employees you’ll meet with what the purpose is getting to know them, hearing what’s going on, improving collaboration, not undermining their manager.
Example invite :-

“Hi Team, I’d like to set up a skip‐level conversation so we can talk about what’s going well, any challenges, and how you’re experiencing the organization. Your manager knows this is happening. I’m looking forward to connecting.”
- Decide frequency / cadence
  - You can’t meet with everyone very often. For many teams, quarterly or bi-monthly is a reasonable interval.
  - Prioritize based on key teams, high changes, or high-risk groups.
Example: If you manage 100 engineers including contractors via 10 managers, you might aim to meet every engineer at least once every month, or rotate more often for critical teams.
- Prepare an agenda, but keep it flexible
  - Have open‐ended questions:- What’s going well ?, What’s getting in your way ?, What questions do you have for me or the organization ? , What support do you feel you’re missing ? .
  - But leave space for the employee to raise what matters to them. Some senior leaders prefer no strict agenda to make it less formal.
Example agenda :-
- Intro / check-in (5 min)
  - What’s been working well in your team (10 min)
  - What are the blockers you’re seeing (10 min)
  - How aligned do you feel with the broader company/vision (5 min)
  - Any questions for me (5 min)
  - Wrap up and next steps (5 min)
- Invite the right people
  - Typically, the senior leader (you) + the individual contributor (IC).
  - Sometimes: small group of 2-3 ICs (to share perspectives) rather than individual.
  - Do not regularly include the manager in between (unless part of a special meeting) the whole point is the skip level. However, the manager should be aware in advance.
Example:- For your team you might schedule one skip‐level per week, alternating between different team leads’ teams.
- During the meeting best practices
  - Build rapport, start with non-work chat, ask about how they’re doing, what recent wins they’ve had.
  - Listen more than you talk. These sessions are for them.
  - Ask about their view of their manager ‘What’s your manager doing well ? Is anything missing? ‘ (Careful to not undermine)
  - Ask about team culture, blockers, cross-team dependencies, career aspirations, alignment with company strategy.
  - Reassure confidentiality, emphasize you are not coming to judge them or their manager, but to support.
  - Note do not make major decisions on the spot that bypass the manager. Avoid undermining the chain of command.
- Follow up and close the loop
  - After the meeting, send a short note ‘Thanks for our conversation, I’ll follow up on …’
  - Where appropriate, share aggregated/anonymous feedback with the manager in your 1-1 with them, or share positive feedback with the manager (so manager knows their report gave praise).
  - Track themes over time. Use what you hear to identify systemic issues, managers needing support, cross-team blockers.
  - Set next meeting or check-in.
What types of folks do you invite on skip-level meetings ?
- Individual contributors (engineers, QA, designers) who report to your direct reports (the engineering managers).
- In some cases, team leads or senior ICs who are key to cross‐team initiatives.
- High potential staff you want to develop or connect with leadership.
- Teams undergoing change, or where you sense risk (e.g., high turnover, morale issues).
- You typically do not invite every manager’s manager directly (unless the structure is shallow). The idea is skipping one layer, not multiple.
Why does having skip level meetings help and what problems does it solve?

Let’s summarize the benefits a bit more with examples:
- Visibility of reality: Suppose you receive quarterly updates from engineering managers and everything seems on track. But in skip-level meetings you learn that engineers are frustrated with slow build times, and morale is low. You can intervene earlier, coach the manager or look into infrastructure investment.
- Trust and retention: An engineer who feels they are just a number may become disengaged. When they meet a senior leader, they feel seen, heard, and connected. That reduces risk of attrition.
- Manager development :- By hearing feedback directly from their reports (via you), you can coach the engineering manager ‘Several of your engineers would like more clarity on team goals.’ You support your manager rather than throwing them under the bus.
- Cross‐team improvement: You might discover that Team A is reinventing a tool Team B already built. With skip-level meetings, engineers raise this, you coordinate across managers, avoid duplication.
- Culture and alignment: You reinforce that “leadership is accessible,” that feedback matters, and that the chain of communication is not rigid. That helps build a healthier engineering culture.
- Strategic messaging: You can reinforce broader strategy (“Here’s how your work fits into company goals”), which may not come through via direct manager.
Problems / pitfalls of skip level meetings
- If done poorly they can undermine the manager in between (making them feel bypassed).
- If employees see them as surveillance they may be guarded and not share openly.
- They require time, and if you meet too often you risk diminishing the value or interfering with manager‐IC relationships.
- If you show up infrequently or don’t follow up, they may feel superficial and reduce trust.
- If you use skip‐level meetings as a blame or catch exercise, morale may suffer.
Example scenario of skip level meeting in software engineering

You are Senior Engineering Manager “Alice” who oversees engineering managers Bob (Team X), Carol (Team Y) and Dan (Team Z). Alice schedules monthly skip‐level meetings rotating among engineers across the 3 teams.

Meeting example: Alice meets with “Eve,” an IC on Team Y.
- Introduction: “Hi Eve – how are things going? What’s one highlight from your last sprint?”
- She asks: “What’s working really well in your team?” Eve says: “Our sprint cadence is smooth; our retrospectives are improving.”
- She asks: “What’s getting in your way?” Eve says: “The build pipeline is slow, causing rework; our manager escalated it but it’s still a blocker.”
- She asks: “Do you feel aligned with the company’s priority about reliability this quarter?” Eve says: “Not fully, I had to ask my manager; a lot of us don’t see how our work directly contributes to it.”
- She asks: “What could I or the org do to help you?” Eve says: “More transparency about dependencies, maybe a cross‐team forum.”
- They agree on next steps: Alice will talk with Carol and infrastructure team to review build pipeline. Alice will also share alignment message about reliability in the next all‐hands.
- After the meeting: Alice sends a short note to Eve: “Thanks for your time – I’ll follow up on the pipeline with Carol & infra team; I’ll also brief you on next steps in our next meeting.”
- Alice also in her next 1-1 with Carol says: “In my skip‐level with Eve I heard build pipeline delays can we take this on?” She frames it as “I heard a recurring issue across multiple engineers.”
  This sequence helps surface a problem (pipeline delay) that might not have come up in other forums, reinforces alignment, supports the manager and improves the organization.
Bringing it together Manager of Managers + Skip Levels in Your Professional Life

Here’s how this applies for someone looking into transitioning to this role

Transition from Engineer  Engineering Manager  Manager of Managers
- At the individual contributor (IC) level success was about delivery, code quality, technical leadership.
- As a manager we focus on your team, hiring, mentoring engineers, sprint execution, backlog, team culture etc.
- As we move toward director or senior manager (managing managers), impact has to scale we now care about multiple teams, cross‐team dependencies, engineering metrics (quality, cycle time, reliability), strategic alignment, manager capability.
Key learnings
1. Delegation and leverage: You cannot be in the weeds of every team’s daily delivery. You must empower your engineering managers, set clear objectives, remove roadblocks, and enable them while you hold the vision and orchestration across teams.
2. Frameworks and culture at scale: Because you’ve seen many projects and technologies, you can now build processes, practices, engineering standards across teams enabling replication of success and avoiding repetition of past mistakes.
3. Skip-level meetings as a tool: When you reach this layer, skip level meetings become critical. They help you hear what your engineering managers may filter out, sense morale, culture, and system issues early. They also help your managers by building transparency: your engineers know you care. For your personal brand, it shows you’re accessible and invest in people.
4. Identifying emerging leaders: With skip levels you can spot engineers who are future managers or architects, and invest in their growth early helping your leadership pipeline.
5. Balancing strategy & execution: You’ll spend less time in trenches, your job becomes more about enabling, aligning, removing impediments, and setting direction. You’ll operate at a team-of-teams level. Recognizing this shift is a key professional development step.
Strengths you bring and how to maximize them
- Your deep technical experience gives you credibility with both ICs and managers. Leverage that to coach managers and build trust.
- Your experience in digital automation/group-based work (RPA, BPM, value streams etc.) means you’re familiar with cross-team value streams which is perfect for a manager of managers context.
- Your mentoring background (you already have mentees) positions you well to develop managers, which is one of the key strengths expected in a manager of managers role.
Weaknesses to guard against
- Because you’re used to deep involvement, you might find it hard to let go of tactical detail or delivery tasks. You’ll need to shift mindset from I do to I enable .
- Risk of being pulled into many meetings and losing strategic time, as a manager of managers you must guard your calendar, set clear boundaries, and ensure your role doesn’t turn into over-manager or bottleneck.
- Risk of distance from the work- As you move higher you may lose the feeling of daily team life skip levels help mitigate this, but you need to make it a habit.
- Information overload / filter distortion -You rely on your engineering managers summaries and your skip-level efforts , ensure you use varied channels, data, and skip level feedback to triangulate reality.
How this affects your personal & professional life
- Personal development: Mastering the manager-of-managers role is a major career shift. It means focusing more on people, leadership, cross-team collaboration and less on writing code or designing modules. It’s more about influence than direct output. You’ll need to develop new skills, strategic thinking, system-level leadership, coaching leaders, far fewer hero mode moments, more help others be heroes.
- Professional impact: You’ll be able to impact the engineering organization at scale through improved quality, reduced time-to-market, better cross-team synergy, improved retention and culture. Your role becomes a multiplier of value.
- Work life balance: Because your role changes, you might find fewer deliverable milestones and more ongoing leadership expectations. It may require disciplined time management, focus on transitions and boundaries.
- Legacy and growth: In mentoring managers and designing systems, you build not just features but organizational capability. The skip level meetings help you stay grounded and ensure your leadership remains relevant.
- Connection and satisfaction: Rather than focusing solely on immediate deliverables, you’ll get satisfaction from seeing teams perform, seeing leaders you developed succeed, seeing patterns you unlock across teams. The deep connection with engineers via skip levels also keeps you connected to why you got into engineering in the first place.
Understanding Technical Debt : Causes and Solutions

September 29, 2025
An emerging perspective in modern software development, influenced by lean methodology and from works like The Goal, Lean Startup, and Project to Product, is that mistakes and experimentation are essential for learning. This often means releasing imperfect software into production, which naturally creates some technical debt. The initial shortcuts or compromises are the principal, invisible to users but clear to developers, while the long-term impact bugs, quality issues, and slower delivery is the interest. The key distinction is between deliberate, prudent debt incurred for speed and learning, versus reckless debt caused by carelessness. Rather than striving for perfection or rewarding sheer volume of code, successful teams focus on delivering incremental units of value, accepting manageable debt as part of an adaptive and iterative software process.

For example, in a major banking initiative that was built on MongoDB, Kafka, AWS, and the Spring Framework technology stack and related java-based stack, technical debt accumulated rapidly due to shortcuts taken by the offshore vendor team under tight delivery timelines. Instead of carefully planning data models and adhering to MongoDB best practices, collections were loosely structured, queries became inefficient, document exceeding the limit supported and schema inconsistencies began to appear across services. Unit testing was often gamed or skipped to meet deadlines, leaving brittle codebase with hidden defects. Kafka was introduced for event streaming, but without proper design standards or validation pipelines, issues like message duplication, too many events that were not needed and processing delays surfaced. Over time, these gaps created mounting operational inefficiencies and raised long-term maintenance costs.

Although an on-site technology team provided governance, the distributed offshore model made reviews largely reactive rather than preventative. By the time design flaws were identified, many had already been deployed into production, making remediation costly and disruptive. This resulted in mounting technical debt that surfaced as constant rework, frequent patching, and a noticeable decline in delivery velocity. Beyond the technical inefficiencies, the absence of consistent standards and robust quality controls posed risks to regulatory compliance and eroded customer confidence two non-negotiable priorities in the banking sector. Ultimately, this case illustrates how unmanaged technical debt in mission-critical financial systems can quietly erode both business agility and long-term system resilience.

So technical debt is the implied cost of choosing a quick or easy solution today instead of a better, more sustainable one that might take longer to implement. Just like financial debt, it allows teams to move faster in the short term but creates a repayment burden later in the form of rework, reduced productivity, lack of flexibility for further extension and increased system fragility. It often arises from poor design, lack of testing, rushed development, or skipping best practices, and while some debt can be intentional and manageable, un-managed technical debt accumulates and can slow down innovation, increase risks, increase costs and make systems harder to maintain over time.

Technical debt is often categorized by its origin and the awareness among the team as when it was incurred during the development life cycle. I will write about these later on. There are categories as how we classify debt and some are
- Good Debt vs. Bad Debt : –
  - Good Debt : Debt taken on knowingly and strategically to achieve a clear, immediate business goal (e.g., shipping a feature quickly to beat a competitor). The team accepts the risk and plans to pay it back.
- Deliberate vs. Accidental : –
  - Deliberate Debt : The team decides to take the shortcut (e.g., hard coding a value) to meet a deadline. This aligns with prudent debt.
  - Accidental Debt (or Unintentional): Debt that accumulates over time due to evolving understanding of the product, new business requirements, or learning that a previous design decision was simply incorrect. This is often the largest source of debt.
Technical debt can be classified as
- Process-Related Causes
  - Rushed development to meet tight deadlines.
  - Frequent scope or requirement changes without redesign.
  - Short-term fixes and workarounds prioritized over long-term solutions.
  - Lack of regular code reviews or quality assurance checkpoints.
  - Inadequate planning for scalability and maintainability.
- People-Related Causes
  - Limited technical expertise or lack of training in tools/frameworks.
  - Poor communication between business and technical teams.
  - Misaligned priorities between stakeholders (e.g., speed vs. quality).
  - Inconsistent coding practices across distributed or offshore teams.
  - High turnover, leading to knowledge gaps and loss of context.
- Technology-Related Causes
  - Incomplete or poor data modeling and architecture.
  - Skipping unit tests, integration tests, or automated testing.
  - Not following best practices for databases, frameworks, or cloud services.
  - Overly complex, bloated, or redundant code base.
  - Legacy system dependencies without modernization planning.
  - Insufficient or outdated documentation.
Some of the business domain applications where I have seen very high technical debt are in
- Banking and Financial Services
  - Applications related to Core banking systems, payment processing, credit risk engines.
  - Many banks rely on decades-old COBOL-based mainframe program integrated with newer systems (e.g., API’s, mobile apps). Rushed compliance updates, fragmented data models, and vendor-driven offshore development often leave behind fragile architectures.
- Healthcare and Life Sciences
  - Applications related to Electronic Health Records (EHR), patient portals, insurance claims processing.
  - Systems are typically a patchwork of legacy software tied together with new cloud or AI modules. Strict compliance (HIPAA, GDPR) leads to quick-fix security patches, while poor interoperability standards create messy integrations across hospitals, labs, and insurers. Offshore Vendor Driven Development often leads to Technical Debt due to various reasons like gaps in skills, requirements misunderstanding etc.
- Telecommunications
  - Billing systems, customer management platforms, network monitoring.
  - High user volumes force companies to add features quickly. Mergers and acquisitions introduce multiple legacy stacks, leading to duplicated logic and fragile middle-ware layers. Billing engines especially carry massive customization with poor documentation. Offshore Vendor Driven Development often leads to Technical Debt due to various reasons like gaps in skills, requirements misunderstanding etc.
- Retail and E-Commerce
  - Inventory management, omnichannel order fulfillment, personalization engines.
  - Fast-moving competition drives teams to push out features without long-term design. Legacy ERP systems often fail to scale with cloud-based microservices, creating complex, high-maintenance integrations.
Key Strategies that help to deal with Technical Debt are
- Identify and Track Debt : – Maintain a “technical debt register” or backlog itemizing known issues.
- Prioritize by Impact :- Tackle the debt that most affect business outcomes (e.g., security risks, customer experience).
- Refactor Incrementally :- Improve code, data models, or tests in small steps rather than waiting for big rewrites.
- Adopt Testing & Automation :- Use unit, integration, and regression testing with CI/CD pipelines to prevent new debt.
- Set Standards & Best Practices :- Enforce coding guidelines, architecture reviews, and documentation practices.
- Communicate in Business Terms :- Explain the cost of debt as slower delivery, higher risk, or lost revenue to gain stakeholder buy-in.
Dealing with technical debt is less about eliminating it entirely and more about managing it strategically. Teams must acknowledge that some debt is intentional taken on to move quickly and should plan to repay it before it accumulates interest. By embedding refactoring into regular sprints, strengthening automated testing, and aligning teams on best practices, organizations can gradually reduce hidden risks while still delivering value. Importantly, leaders need to view technical debt not as a purely technical issue but as a business trade-off; when its impact is communicated in financial and customer terms, it becomes easier to secure time and resources for remediation.

The cost of resolving technical debt can be significant, often consuming 20–30% of a project’s budget depending on its severity and how long the debt has been left un-managed. For example, minor issues such as missing unit tests or small refactors may take days or weeks to resolve, costing a fraction of the sprint. In contrast, large-scale debt—such as poor data modeling, outdated frameworks, or legacy integrations—can extend timelines by several months and add millions of dollars in remediation costs for enterprise projects. The longer the debt remains, the more “interest” it accrues: bugs take longer to fix, new features take longer to deliver, and maintenance costs grow exponentially. Industry studies suggest that organizations often spend up to 30% of their development time addressing technical debt rather than delivering new features, making proactive debt management essential to avoid ballooning project costs and delays.

By solving technical debt, organizations gain both short-term efficiency and long-term resilience in their software systems. Reducing debt improves developer productivity, since clean, well-structured code base are easier to maintain, extend, and debug meaning less time wasted on workarounds and rework. It also strengthens system reliability and performance, as refactored architectures reduce bugs, downtime, and inefficiencies. From a business perspective, addressing technical debt lowers project costs by minimizing maintenance overhead, accelerates time-to-market for new features, and ensures smoother compliance with security and regulatory requirements. Just as importantly, it boosts team morale and collaboration, because developers spend more time innovating and less time fighting fragile code.

References : –

Sourcery. (2022, September 24). The impact of technical debt

Martini, A., Besker, T., & Bosch, J. (2018). Technical debt tracking: Current state of practice.
Engineering Team Effectiveness: Part 1

September 23, 2025
Some Engineering Teams function like finely tuned engines, consistently delivering success. Their communication is smooth, deadlines are met with ease, and challenges are faced directly. On the other hand, some teams struggle to hit their goals. Their communication is disorganized, messy and deadlines often feel overwhelming. So, what sets the high-performing teams apart? . It usually comes down to a few key things having a clear plan, open communication, trust, and a shared sense of purpose. Some teams already have the rhythm down, while others are still working to find their groove.

The great thing is, that rhythm can be learned. Even teams that struggle at first can build momentum with practice. In software engineering, this rhythm shows up in the way teams consistently create value by writing code, testing it, and releasing useful features to the world. Teams that do this well and often are considered effective. So, if we want to build great software, we first need to focus on building strong, effective engineering teams.

I’ve witnessed how team dynamics can either drive a project to success or cause it to fall apart. Creating effective teams isn’t only about having the right technical skills it’s about building a culture rooted in collaboration, trust, and a common purpose. Team is a group connected by shared goals and responsibilities. Its members collaborate and hold each other accountable as they tackle problems and work toward success. When planning, reviewing progress, or making decisions, effective teams consider the strengths and availability of everyone not just one person. It’s this shared purpose that powers true teamwork.

Google’s Project Aristotle uncovered some key dynamics that drive the success of software engineering teams and some of attributes of the that came out of that research are

Psychological Safety

Researchers in Google found this to be the single most important factor. It’s about how safe team members feel sharing their thoughts and ideas without worrying about criticism or backlash. When teams feel secure, they’re more willing to take risks and explore new ideas often leading to stronger results.

Teams with high psychological safety : –
- Have lower turnover rates
- Make better use of the diverse ideas shared within the group
- Generate more revenue and consistently hit sales targets
- Are rated as highly effective by their leaders
Signs your team may need to strengthen psychological safety:
- Team members avoid giving or asking for constructive feedback.
- People hesitate to share different viewpoints or ask basic questions.
- Silence dominates meetings, with only a few voices regularly speaking up.
- Mistakes are hidden rather than discussed and learned from.
- Decisions get made quickly without much debate or input from everyone.
Reflection questions for Team :
- Do team members feel at ease brainstorming in front of one another ?
- Can they admit mistakes or failures openly without feeling judged or excluded ?
- Does everyone get a chance to speak in meetings, or do a few people dominate the conversation ?
- Do people feel their ideas are valued, even if not all are adopted ?
- Are disagreements handled respectfully, without fear of backlash ?
- Do team members support each other when someone takes a risk or tries something new ?
Dependability

This is all about how much team members can count on one another to follow through finishing tasks and meeting deadlines as promised. When people trust each other to be reliable, the team naturally becomes more efficient and effective.

Signs your team may need to strengthen dependability:
- Limited visibility into project priorities or progress
- Tasks or problems lack clear ownership, leading to diffusion of responsibility
- Deadlines are often missed without explanation
- Follow-ups are needed frequently to ensure work gets done
Reflection questions for Team : –
- When team members say they’ll complete something, do they follow through?
- Do team members proactively communicate delays and take responsibility?
- Are deadlines consistently met without last-minute scrambling?
- Do people feel comfortable holding each other accountable?
- Is work quality consistent, or do others often need to step in to fix issues?
- Are responsibilities clearly defined so everyone knows who owns what ?
Structure and Clarity

It is about making sure everyone knows the team’s goals as well as their own roles and responsibilities. When expectations are clear, team members stay more focused, productive, and aligned with the bigger picture.

Signs your team may need to strengthen structure and clarity : –
- Team members are unclear about project goals or priorities.
- Roles and responsibilities are not well defined, causing overlap or gaps.
- People frequently ask, Who’s responsible for this ?
- Tasks are started but left unfinished due to shifting direction.
- Meetings end without clear next steps or ownership.
- Progress is hard to measure because expectations aren’t specific.
Reflection questions for Team :-
- Do all team members clearly understand the team’s goals ?
- Are individual roles and responsibilities well defined and documented ?
- When new tasks arise, is it obvious who should take ownership ?
- Are expectations and deadlines communicated in a way everyone understands ?
- Do team members feel confident about what success looks like in their work ?
- Is there a process for reviewing progress and adjusting priorities when needed ?
Meaning

This is about how much team members feel their work truly matters. When people see purpose in what they do, they’re more motivated, engaged, and committed to the team’s success.

Signs your team may need to strengthen meaning : –
- Team members treat tasks as routine checkbox work rather than purposeful contributions
- Motivation and engagement drop, especially for repetitive or long-term projects
- People rarely connect their work to personal values or the team’s mission
- Conversations focus only on outputs (tasks completed) rather than outcomes (why it matters)
- Team members show little enthusiasm when talking about their work
Reflection questions for Team :-
- Do team members feel their work has personal significance and aligns with their values ?
- Are we regularly connecting day-to-day tasks to the bigger mission of the project or organization ?
- Do people feel proud to share what they’re working on with others ?
- Is the purpose of our work clear and consistently communicated by leadership ?
- Do team members find opportunities for growth and fulfillment in what they do ?
- Are we celebrating not just the “what” but also the “why” behind our achievements ?
Impact

This reflects how strongly team members believe their work makes a real difference whether for the organization or for society at large. When people feel their contributions have impact, they tend to be more committed, energized, and invested in the project’s success.

Signs your team may need to strengthen impact:
- Team members struggle to see how their work connects to larger goals.
- Achievements go unnoticed or un celebrated.
- People feel like they’re just checking boxes rather than driving real change.
- Motivation drops when tasks seem disconnected from outcomes.
- Success stories or customer feedback are rarely shared
Reflection questions for Team :
- Do team members understand how their work contributes to the organization’s success ?
- Are individual and team achievements recognized and celebrated?
- Do people feel their efforts make a difference to customers, colleagues, or society ?
- Is leadership regularly communicating the broader purpose and value of the team’s work ?
- Do team members feel proud to talk about their contributions outside of the team ?
- Are we connecting day-to-day tasks to meaningful outcomes ?
By focusing on these factors, software engineering teams can create an environment conducive to collaboration, innovation, and success.

There are also other factors that influences the team dynamics like size of the team, adaptability, diversity, leadership and communication styles.

References : –

Google rework : https://rework.withgoogle.com/intl/en/guides/understanding-team-effectiveness

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