Blog

Most engineers understand horizontal scaling in theory, but very few have felt it running on their own machine. Here is how I built a minimal horizontal scaling lab using Docker Compose and NGINX.

Ever wonder why your database crawls even with indexes? Standard indexes map every single row, but PostgreSQL offers partial and expression indexes to work smarter.

For small client projects, reliability matters more than fancy infrastructure. Learn how to design a simple, reliable, and cost-effective backup and hosting setup.

Most people think MCP tools are just fancy API wrappers. But with Sampling, tools can think mid-task, changing how autonomous agents communicate and adapt.

Imagine Alice and Bob clicking buy on the last iPhone at the exact same millisecond. Without proper database transaction isolation, you get double-selling. Here is how row-level locking solves it.

Why Lambda is not an Express endpoint

Most performance issues I’ve seen in JavaScript apps weren’t caused by React, Node or bad code. There were caused by **waiting on the database** That’s the gap Redis was built to fill.

At first glance, they sound interchangeable. In reality, they’re built with very different priorities. Choosing the right one early can save you cost, reduce latency, and simplify your architecture.