Programming Tutorials

One of the most common interval-based interview questions is Merge Intervals. At first glance, it looks like a simulation problem, but the real trick

TL;DR for the impatient. qdf is a schemaless Go serializer (struct tags, no .proto). On real batches it's up to 68% smaller than protobuf, decodes 4–

Prisma 5 → Prisma 6: The Breaking Changes I Hit in My Real Schema and How I Fixed Them Without Breaking Production The correct approach to

Prisma 5 → Prisma 6: los breaking changes que encontré en mi schema real y cómo los resolví sin romper producción La solución correcta para

Test your knowledge of GitHub Copilot code review in pull requests, including custom instructions and automatic reviews.

Golang Development has become one of the fastest-growing areas in modern software engineering. Created by Google, Golang, also known as Go, is a power

Three engineers, Robert Griesemer, Rob Pike, and Ken Thompson, at Google in 2007 were tired.Three engineers at Google, Robert Griesemer, Rob Pike, and

The Problem Every JavaScript Developer Knows It is 2 AM. Your production deployment just failed. The error log says something like this:

Spring Boot 4 just shipped with native Jackson 3 support. Good moment to revisit how much Java we write when we work with JSON. If you've built a Spr

When I started learning Spring Security, I kept seeing two terms everywhere: Authentication and Authorization At first, they sounded almost the same

When I started building Termique, I knew one thing for sure: it had to feel fast. An SSH manager is a tool you open constantly. You switch between se

Trading bot builders face a complex challenge: how do you create reliable risk controls that protect your capital without slowing down profitable trad

What I Built ReviewFlow is an automated Code Review pipeline driven by a custom Multi-Agent architecture written in native TypeScript. Instead of rely

I Built a Vector Search Engine from Scratch — Here's What I Learned Implementing HNSW (Hierarchical Navigable Small World) graphs, hybrid

Matrix problems often seem tricky because multiple rows and columns move at the same time. In this problem, we need to rotate an n × n matrix by 90 de

Building a Distributed Rate Limiter That Handles 18,769 req/s with Redis Lua Scripts How I implemented 4 atomic rate-limiting algorithms,

"The biggest benefit of input() and output() isn't less code. It's a more predictable component architecture." Table of Contents The Pr

Six Months of AI-Assisted Software Development: A Critical Evaluation of Vibe Coding, Agentic IDEs, and Real Engineering Introduct

Recently I was brought into a project involving a legacy WordPress website that had suffered a security incident. By the time I got access, parts of t

Every week I had to send 100+ personalized emails. Open Excel → copy name → paste → change email → repeat 100 times. It was taking nearly 3 hours ev