In-depth Architecture articles by Senior Java Developer Pavan Rangani — practical, production-grade tutorials and engineering deep-dives. 45 articles in this category.
August 18, 2026
A recommendation service goes down and takes the whole product page with it. That is not a recommendation outage – it is a design failure. Graceful degradation is building so that a dead dependency co… Read more
August 18, 2026
API versioning sounds like a URL-format debate, but the real problem is changing an API without breaking clients you do not control and cannot redeploy. What actually counts as a breaking change, and … Read more
August 18, 2026
There are only two hard things in computer science, the joke goes, and cache invalidation is one of them. The caching patterns worth knowing, the staleness each one accepts, and the stampede that take… Read more
July 23, 2026
A service slows down, every client retries, and the retries become the load that finishes it off. How retry storms form, why jitter matters more than backoff, and why retry budgets beat per-request li… Read more
July 17, 2026
Silo, bridge, or pool? Compare multi-tenant data isolation models on blast radius, cost, and operational load. Learn PostgreSQL row-level security, safe tenant context propagation, noisy-neighbour con… Read more
June 12, 2026
How idempotency keys turn at-least-once delivery into safe, exactly-once API behavior, with request fingerprinting, response replay, and concurrency handling in Java and SQL.… Read more
May 8, 2026
Production patterns for eventual consistency in event-driven microservices: outbox, idempotency, sagas, schema evolution, and staleness UX.… Read more
May 8, 2026
A pragmatic Spring Boot implementation of hexagonal architecture with primary and secondary ports, module layout, and testing strategies that scale.… Read more
April 7, 2026
Practical guide to implementing Event Sourcing and CQRS in production systems. Covers event stores, read projections, snapshots, and honest trade-off analysis.… Read more
April 6, 2026
Master cell-based architecture patterns for fault isolation in distributed systems. Covers cell routing, blast radius containment, and real-world deployment strategies.… Read more
March 26, 2026
Complete guide to feature flag architecture — flag types, targeting rules, progressive rollouts, kill switches, and managing feature flag technical debt.… Read more
March 26, 2026
Step-by-step guide to the strangler fig pattern for monolith to microservices migration with routing strategies, data extraction, and rollback techniques.… Read more
March 26, 2026
A practical guide to the transactional outbox pattern for reliable event publishing in microservices, covering polling publishers, log-based CDC, and failure handling.… Read more
March 25, 2026
Production guide to implementing CQRS and event sourcing with Axon Framework including command handling, event stores, read model projections, and scaling strategies.… Read more
March 23, 2026
Complete guide to platform engineering with golden paths and self-service templates using Backstage, Crossplane, and standardized development workflows.… Read more
March 22, 2026
Complete guide to Vertical Slice Architecture for building clean, maintainable systems organized by feature rather than technical layer with real-world patterns.… Read more
March 21, 2026
Practical guide to implementing data mesh architecture with patterns for domain ownership, data products, self-serve platforms, and federated computational governance.… Read more
March 20, 2026
A practical decision guide comparing API gateways and service meshes for microservices architectures, with real-world selection criteria and deployment patterns.… Read more
March 16, 2026
Complete guide to local-first software architecture — CRDTs, sync engines, conflict resolution, and production patterns for offline-capable applications.… Read more
March 10, 2026
Complete guide to saga patterns in microservices covering orchestration vs choreography, compensating transactions, failure recovery, and production implementation with Spring Boot and Kafka.… Read more
March 9, 2026
Architect production API gateways for microservices with intelligent routing, rate limiting, authentication offloading, and distributed tracing.… Read more
March 9, 2026
Design scalable event-driven microservices using Apache Kafka with CloudEvents standard for interoperability and schema evolution.… Read more
March 9, 2026
Data-driven analysis comparing serverless functions vs containers for cost efficiency, performance characteristics, and scaling patterns in 2026.… Read more
March 8, 2026
Design highly scalable systems using cell-based architecture with independent failure domains, cell routing, and blast radius reduction patterns.… Read more
March 7, 2026
Apply domain-driven design principles to microservices architecture with bounded contexts, aggregates, and ubiquitous language patterns.… Read more
March 6, 2026
Design scalable distributed systems using event-driven architecture patterns including event sourcing, CQRS, and message-driven communication.… Read more
March 5, 2026
Implement Istio service mesh with ambient mode, mTLS encryption, traffic management, and observability for production Kubernetes deployments.… Read more
March 4, 2026
Choose and implement API versioning strategies including URL path, header-based, and content negotiation approaches with backward compatibility patterns.… Read more
March 3, 2026
Compare modular monolith and microservices architectures with practical trade-offs, migration patterns, and decision frameworks for 2026.… Read more
March 2, 2026
Implement the Backend for Frontend pattern with per-client API layers, GraphQL aggregation, and optimized data shaping for mobile and web clients.… Read more
March 1, 2026
Modernize legacy systems incrementally with the strangler fig pattern using API gateway routing, parallel running, and feature flag strategies.… Read more
February 28, 2026
Implement clean architecture with domain-driven design patterns including entities, use cases, interface adapters, and the dependency rule.… Read more
February 27, 2026
Implement the saga pattern for managing distributed transactions across microservices. Learn choreography vs orchestration approaches with practical examples.… Read more
February 25, 2026
Learn how cell-based architecture is changing global systems by improving resilience, blast radius containment, and fault isolation at scale.… Read more
February 24, 2026
Compare API gateway solutions — Kong, Envoy Proxy, and AWS API Gateway — for routing, rate limiting, authentication, and observability.… Read more
February 24, 2026
The debate around React Native vs Flutter continues to dominate mobile development discussions in 2026. As a result, choosing the […]… Read more
February 24, 2026
Effective mobile app performance optimization is critical for user retention and app store rankings in 2026. In fact, research shows […]… Read more
February 23, 2026
Implement Event Sourcing with CQRS for building audit-ready, scalable systems — with practical examples in Java and TypeScript.… Read more
February 17, 2026
REST is not dead, GraphQL is not a silver bullet, and gRPC is not just for microservices — choosing the right API style.… Read more
February 14, 2026
Expand-contract pattern, dual writes, ghost tables, and schema versioning for production database changes.… Read more
February 12, 2026
15 microservices, 6 data sources, one unified API. GraphQL Federation lets each team own their subgraph while the router composes a seamless supergraph for the frontend.… Read more
February 11, 2026
Design a modular monolith with clear boundaries, independent modules, and a migration path to microservices.… Read more
February 8, 2026
Cache-aside, write-through, cache invalidation, and thundering herd — caching patterns for high-traffic systems.… Read more
February 1, 2025
Lessons learned from building distributed systems at scale — saga patterns, circuit breakers, and the patterns that saved us in production.… Read more
January 20, 2025
Building resilient, decoupled systems using Kafka — from basic pub/sub to complex event sourcing patterns in Java.… Read more