Infrastructure
Writing a Dockerfile That Does Not Weigh 2GB
Why Docker images get bloated, how layer caching works in practice, and the specific techniques that produce small, fast, secure images without sacrificing developer experience.
All posts
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Computer Science
Processes, Threads, and Coroutines: What They Are and When to Use Each
The concrete differences between processes, threads, and coroutines at the OS level, and how to choose the right concurrency model for the problem in front of you.
Career & Culture
How to Grow from Junior to Mid to Senior
What actually distinguishes each level, why the progression stalls for many engineers, and the specific habits and skills that accelerate the path.
Performance
Memory Leaks: How They Happen and How to Find Them
What memory leaks actually are in garbage-collected languages, the common patterns that cause them, and how to use heap profiling to track down and fix them.
Testing
TDD: When It Works and When It Gets in the Way
An honest assessment of test-driven development - the contexts where writing tests first genuinely improves code design, and the ones where it adds friction without benefit.
Observability
Debugging in Production: Where to Start
A systematic approach to finding the root cause of production issues - how to use logs, metrics, and traces together, and the mental models that turn panic into process.
Infrastructure
CI/CD from Zero: A Working Pipeline with GitHub Actions
What CI/CD actually is, why it matters, and how to build a real pipeline from scratch using GitHub Actions that runs tests, builds artifacts, and deploys automatically.
Security
SQL Injection in 2026: Still a Problem, Still Preventable
Why SQL injection persists despite being well-understood, how it works at the query level, and the defense patterns that reliably prevent it in any stack.
Mobile
Push Notifications: FCM, APNs, and What Happens in Between
How push notifications actually work from server to device, the differences between FCM and APNs, and the failure modes every mobile backend developer needs to understand.
Software Architecture
API Design Principles That Age Well
The design decisions that make APIs a pleasure to work with years later - consistency, clear contracts, thoughtful versioning, and the mistakes that are expensive to undo.
Data Engineering
Stream Processing vs Batch Processing: How to Choose
What stream and batch processing actually are, the real tradeoffs between them, and how to decide which approach fits your data pipeline requirements.
AI & Machine Learning
Building a RAG System: Retrieval-Augmented Generation Explained
How RAG works under the hood, why it solves the hallucination and knowledge cutoff problems, and what you need to build one that actually works in production.