NestJS: The Backend Framework That Makes Node.js Feel Grown-Up 🚀
If you have ever tried to build a large Node.js backend and thought, "Why does this feel like I'm making it up as I go?" — you are not alone. Express …
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Day 36 of Learning MERN Stack
Hello Dev Community! 👋 It is officially Day 36 of my journey to master the MERN stack! Yesterday, I spun up my very first local web server. Today, I a…
I Built a Redis Clone from Scratch in Node.js — RESP, Persistence, Replication, Pub/Sub and Transactions
Most of us use Redis like this: SET name Alice GET name It feels simple. You send a command. Redis stores something. You get the value back. But I wan…
Kinesis Data Firehose Is Not a Silver Bullet: How Undocumented Partition Key Limits Broke Our Real-Time Analytics Pipeline
Our real-time data pipeline was failing due to mysterious throughput limits. The culprit? A little-known Kinesis Data Firehose limitation that has not…
Headless Browser Detection in 2026: What Still Trips Up Playwright
Playwright is the best browser automation library in 2026. It's also the most fingerprinted, the most detected, and the most patched in anti-bot datab…
How to Call Windows Native APIs in Electron
How to Call Windows Native APIs in Electron Calling Windows native APIs in an Electron app feels like wanting to see the ocean but only having a map. …
Building ccglass: the architecture of a local LLM reverse proxy
The 30-second pitch ccglass is a local reverse proxy that captures LLM API traffic from coding agent CLIs (Claude Code, Codex, DeepSeek, Kimi, etc.) a…
Building AI agents with LangChain
LangChain agents are built on LangGraph : the model calls tools in a loop until it returns a final answer. The high-level entry point is createAgent -…
TypeScript Without tsc in 2026: Type-Stripping in Node.js 24, Bun, and Deno Compared
TypeScript Without tsc in 2026: Type-Stripping in Node.js 24, Bun, and Deno Compared The End of tsc: Why Type-Stripping Changed Everything in 2026 Mos…
Clean API Design in Node.js: A Practical Guide
Most Node.js APIs start the same way. A server.js file. A few routes. Maybe an app.js if you've read a tutorial. Everything in one place because the a…
package.json vs go.mod: Where Did the Version Field Go?
If you come to Go from JavaScript, one small thing surprises almost every developer. Open any package.json . Look near the top. It is always there: { …
Timeouts and Circuit Breakers: Stop One Slow API From Taking Down Your Whole App
When you call another service over HTTP, you are inheriting its worst day. If that dependency slows to a crawl, every request you make to it piles up,…
How I Built a Zero-Dependency Token Compressor for AI Coding Agents (During My High School Exams)
as developers, we are spending more and more time working alongside AI coding agents like Cursor , Claude Code , GitHub Copilot , Windsurf , or Cline …
The Thread Battle: Go Concurrency vs. Node.js Event Loop from First Principles
When building high-concurrency backend services, two ecosystems dominate the conversation: Node.js and Go (Golang). If you ask the internet how they h…
I built a JS/TS runtime in Rust where nothing runs without your permission
Last week I shipped v2.0.2 of 3va — a JavaScript and TypeScript runtime written in Rust. Here is why I built it and what makes it different from Node.…
I built a JS/TS runtime in Rust where nothing runs without your permission
Last week I shipped v2.0.0 of 3va — a JavaScript and TypeScript runtime written in Rust. Here is why I built it and what makes it different from Node.…
Build a video webhook handler that survives duplicates (Express + Postgres)
📦 Code: github.com/USER/video-webhook-receiver (replace before publishing) TL;DR We build a production-grade webhook receiver for async video events (…
I got burned by an EOL Node.js version in prod. So I built a tracker.
Last year, a security audit uncovered a vulnerability in our production environment. The finding: we were using Node.js 16, a version that had been ne…
LLM Cost Optimization: How We Cut Reply Generation from $0.011 to $0.0009
When we shipped the first version of AI-generated replies for HelperX , each reply cost us about $0.011 in API spend. That sounds tiny until you multi…
# I Built a Full Stack Academic Management System for My College — Here's How
I Built a Full Stack Academic Management System for My College — Here's How For my B.Tech final year project, me and my team built Student Sphere — a …
Translating 'I missed you' so it doesn't land like a form letter
I was trying to tell someone something real in her first language — not "I missed you" from a dropdown, but the version that sounds like a person said…
Fixing Fablize Claude Opus Agent Skips: Node.js Blueprint
This article was originally published on BuildZn . Everyone talks about agentic AI, but nobody explains how to stop these things from just making stuf…
Browser Fingerprint Randomization: Beyond User-Agent Rotation
If you're building automation that touches platforms with serious anti-bot systems, User-Agent rotation is what you do in week one. Then you spend the…
Smart Query-Aware Cache Invalidation: Solving Mongoose Performance at Scale
The Mongoose Caching Problem (And How We Solved It) From 300 RPS to 700+ RPS: A 2.2x Performance Breakthrough When you're building a Node.js applicati…
Async APIs: The 202 Accepted + Polling Pattern for Long-Running Operations
Some API requests can't finish in time for a single HTTP response. Generating a report, transcoding a video, running a batch import — these take secon…
Why I Replaced a Node.js Service with 30 Lines of Bash — and When You Shouldn't
A few months ago I had a small job to automate: every day, take a list of URLs from my site and notify Google and Bing that they'd changed, so new pag…
Reading a Paginated API Without Holding the Whole Thing in Memory
Your API hands out 50 records at a time across 400 pages. You need all of them. You do not need them all at once. Here's a very familiar situation tha…
Cut signup spam: syntax + MX + disposable email validation in one call
Client-side regex catches typos, not throwaway inboxes. By the time a fake [email protected] is in your DB, your activation rate and sender reputati…
Add geo-personalization with one IP lookup (IPv4/IPv6, batch)
Geo-personalization — currency, language, "stores near you" — usually means shipping a 60 MB GeoIP database and keeping it updated, or paying per-seat…
Drop-in sentiment, summary & NER without managing an LLM key
Adding "summarize this" or "is this review positive?" to an app shouldn't mean signing up for an LLM provider, managing a key, handling rate limits, a…