Blog — Articles on Software Engineering by Leon Fernando Wijaya
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Thoughts on backend architecture, frontend engineering, DevOps, career growth, and the open source ecosystem.
Why Open Source Contributions Accelerate Full-Stack Mastery
How contributing bug fixes, documentation, and feature extensions to popular open source repositories sharpens your full-stack engineering skills.
Navigating Code Reviews & Architectural Decision Records (ADR)
How establishing structured code review practices and documenting technical context with ADRs accelerates team velocity and preserves knowledge.
Containerizing Enterprise NestJS Microservices for Production
A production guide to dockerizing NestJS microservices: non-root user execution, Alpine base images, healthcheck endpoints, and Kubernetes deployment specs.
Mastering Web Accessibility (a11y) in Modern React Web Apps
Best practices for building inclusive, screen-reader friendly web applications with ARIA landmarks, keyboard focus traps, and WCAG 2.1 compliance.
Implementing Rate Limiting & Sliding Window Algorithms in Redis
Protecting backend APIs against abuse using Redis Lua scripts, token bucket, and sliding window log algorithms for high-throughput rate limiting.
Building Open Source CLI Tools with TypeScript and Node.js
A practical tutorial on authoring developer-friendly command-line tools using Commander.js, Chalk, Inquirer, and publishing them as NPM packages.