Software Architecture
Monolith vs Microservices: The Honest Tradeoffs
What microservices actually cost, what problems they actually solve, and how to think about the decision instead of treating it as a default choice.
What actually matters when building real software systems
Engineering Craft
How to Do a Code Review (and How to Receive One)
A code review is not a gatekeeping exercise. Here is what makes them useful - from both sides of the diff.
Performance
Caching Strategies: Where to Cache and What to Invalidate
Caches speed things up until they serve stale data. Understanding the tradeoffs at each caching layer - and how invalidation actually works - is what keeps them from becoming bugs.
Computer Science
How Memory Works: Stack, Heap, and Why It Matters
What the stack and heap actually are, how memory allocation works at the hardware level, and why understanding this makes you a better programmer in any language.
Networking
WebSockets: When Request-Response Is Not Enough
How WebSockets work, what they are actually good for, and the patterns for building real-time features without the common pitfalls.
Security
Secrets Management: What Not to Do and What to Do Instead
Why secrets in code and environment variables are a problem, what proper secrets management looks like, and how to move from hardcoded credentials to a secure setup.
Mobile
Offline-First: Building Apps That Work Without Internet
What offline-first actually means, how local-first data sync works, and the specific patterns that make mobile apps resilient to unreliable connectivity.
Frontend
Web Performance: What to Measure and How to Fix It
Core Web Vitals explained, how browsers load pages, and the specific changes that actually improve perceived performance for real users.
Observability
Distributed Tracing: Following a Request Across Services
What distributed tracing is, how trace context propagation works, and how to use traces to find the actual source of latency in a multi-service system.
Databases
Transactions and Isolation Levels: ACID in Practice
What ACID guarantees actually mean, what isolation levels exist and what anomalies each one allows, and how to choose the right level for your use case.
Networking
DNS Explained: From Typing a URL to Getting a Response
What actually happens when you type a domain name into a browser - the full DNS resolution chain, from recursive resolvers to authoritative nameservers.
Backend
JWT, Sessions, and OAuth2: What Each One Is Actually For
The differences between JWTs, server-side sessions, and OAuth2, and how to choose the right mechanism for the authentication problem you are actually solving.