Engineering notes distilled from public repositories, READMEs, and the systems behind them.
A hands-on walkthrough to build a working gRPC service in Spring Boot - with proto contracts, server code, a real Java client, and the errors you'll actually hit.
Jun 19, 2026
Build a Java JAR with Maven and deploy directly to Azure App Service using GitHub Actions and OIDC (no Docker, no passwords).
Jun 18, 2026
A beginner-friendly guide to Next.js optimization techniques, including React Server Components, Next.js Image, Suspense streaming, middleware auth, and caching.
May 30, 2026
A hands-on walkthrough to move one real backend project from AWS to Azure - with Docker, CLI commands, and troubleshooting steps.
May 28, 2026
A Spring Boot developer-friendly comparison of FastAPI's architecture, validation, async model, testing style, and deployment workflow.
May 24, 2026
A practical three-day learning path for Spring Boot developers who want to become productive with FastAPI quickly.
A simple English guide based on personal experience building and learning RAG with Spring Boot.
Apr 28, 2026
A beginner-friendly comparison of AWS, Google Cloud, and Azure, with a practical recommendation for where to start first.
Apr 14, 2026
Why dual writes fail under real distributed failures and how the outbox pattern provides safer event publishing.
Jan 14, 2026
A practical beginner-friendly roadmap for learning AWS through one real deployment flow instead of getting lost in service names.
Nov 2, 2025
A practical system design overview of how load balancers help reliability, scaling, and traffic distribution.
Oct 21, 2025
How to choose between TTL, write-through, and event-driven invalidation without breaking consistency or latency goals.
Sep 8, 2025
A beginner-friendly system design article on why sharding is used, what trade-offs it brings, and when to avoid it.
Jul 9, 2025
A detailed comparison of Node.js with Express and Spring Boot across structure, routing, validation, dependency injection, data access, testing, deployment, and real-world trade-offs.
Jun 14, 2025
A practical system design comparison of vectorless and vector retrieval for RAG, including cost, latency, and failure modes.
Apr 30, 2025
What exactly-once really means, where it breaks, and how to design practical end-to-end reliability instead.
Feb 21, 2025
A practical system design guide to understanding where an API gateway is useful and where it can create extra complexity.
Feb 14, 2025
How to decide if CQRS is worth it in your system, with clear signals, trade-offs, and rollout patterns.
Dec 11, 2024
How to design idempotent APIs and jobs to prevent duplicate side effects across retries, queues, and network failures.
Aug 19, 2024
Real-time communication explained: when to use long polling, SSE, or WebSockets, with practical examples and trade-offs.
Jun 27, 2024
A practical architecture for distributed rate limiting with fairness, burst control, and multi-tenant isolation.
Dec 5, 2023