#nodejs

Polling vs WebSockets: How Does the Server Talk Back to You?

You click Submit on LeetCode.

Meteor pluggable DDP transport: meet uWebSockets.js

For thirteen years, every DDP message your Meteor app sent rode the same rails: SockJS. Server-side, that’s a copy-fork of SockJS v0.3.4…

How I Took a Legacy Production System Live on Node 20 and MongoDB 6: What Actually Happened (Part…

The preparation, the cutover night, the first day live, and why we didn’t roll back. Part 1 — Node 6 to 20 · Part 2 — MongoDB 3.4 to 6 ·…

Database locking with raw SQL (FOR UPDATE)

Two concurrent transactions that each SELECT a row, change it in memory, then UPDATE can lose an update or claim the same resource twice…

From push() to reduce(): Mastering JavaScript Array Methods

1. Introduction

Case Study — FeeksFind (Backend)

Or: how two people, one database, and a very stubborn browser taught us what “real-time” actually means.

What Is Swagger? Every Node.js Backend Developer Should Know

When I first started building REST APIs with Node.js and Express.js, my workflow looked something like this:

Expecting Speed, Getting Latency: The Reality of Misusing Async/Await

When I first learned async/await, it felt like best shortcut. I was finally free from the callback hell and the endless .then() chains that…

New to AI? Understanding LLMs for Backend Developers

If you’ve been following AI news, you’ve probably heard terms like ChatGPT, Gemini, Claude, or Llama.

JavaScript Tutorial for Beginners: How JavaScript Runs?(Day — 3)

If you’ve completed the previous two blogs in this series, you already know what JavaScript is and how to set up your development…

Why Off-the-Shelf CRMs Are Holding Your Business Back (And Why We Build Custom CRMs From Scratch)

In today’s fast-paced digital economy, your business processes are your competitive advantage. Yet, thousands of growing companies rely on…

Deploying a Node.js Backend to Google Cloud VM (Ubuntu) with GitHub, PM2, and MySQL

Many tutorials explain how to write a Node.js application.

Clean Code Architecture in NestJS: What I Learned After a Year of Building With It

I started my backend career with plain Node.js and Express. About a year ago I moved to NestJS, and it changed how I structure backend…

Testing a Node.js API with Playwright: A Beginner’s Guide

Most people know Playwright as a tool for automating browsers, but it’s also a solid choice for testing REST APIs directly. It ships with a…

Why Node.js Development Services Are the First Choice for Modern Web Applications

Modern businesses demand web applications that are fast, scalable, secure, and capable of handling thousands of concurrent users. Whether…

Node.js Get Started: Install, Setup & Run Your First App (2026–27)

By Pramod Behera · Updated: July 2026 · 16 min read

The Civil War: CommonJS vs. ESM

This has been a hot topic for debate for a while now. I think it’s time for us to settle the debate and choose the one which is best suited…

Mastering Node.js Worker Threads: Conquering CPU-Bound Tasks with True Parallelism

Best Web Development Course in Dehradun

Best Web Development Course in Dehradun — Complete 2026 Guide

Turning Uploaded PDFs Images and Docs Into Structured JSON with Gemini (Node.js)

I am building a project called Question Maker. People upload their study files like PDFs images or documents. Then they choose how many…

How I Shipped 341 MB of JSON Through Google Apps Script — and Lived to Tell the Tale

How to Publish Your First Package on npm

Publishing to npm sounds intimidating the first time, but the actual process is short — most of the work is in preparing your package…

Node.js Introduction: What Is Node.js, How It Works & Your First Program (2026–27)

By Pramod Behera · Updated: July 2026 · 18 min read

Git hooks with Husky

Git hooks run scripts around local Git events (pre-commit, commit-msg, pre-push, and others). They are a good place for fast checks - lint…

Database Connection Pooling in Node.js: A Complete Beginner’s Guide

Understanding why every serious Node.js backend needs connection pooling — and how to implement it correctly

The Silent Killer in Your Node.js APIs: Mass Assignment & How to Catch It Before Production

Why your ESLint and SonarQube aren’t enough to protect your infrastructure.

The Node.js Performance Issue Hidden in One Innocent Loop

The code looked clean in review, but every item waited for the previous one, and production traffic turned a simple loop into a bottleneck.

Cron jobs and schedulers with BullMQ

In-process cron (node-cron, @nestjs/schedule, OS crontab) runs inside one Node process. That is fine for a single instance, but it does not…

5 Backend System Design Patterns Every Software Engineer Should Know

Learn how modern backend systems solve real production problems using Outbox, Saga, Cache-Aside, Idempotency, and CQRS. We’ll build a…

How to clone a Keycloak realm on the same instance (fixing “duplicate key value violates unique…

If you’ve ever tried to duplicate a Keycloak realm on the same server — say, to spin up a myrealm-dev realm alongside your existing myrealm…

Understanding the Difference Between import.meta.env and process.env

The difference between import.meta.env and process.env is a fundamental part of modern frontend development, but it is also a common source…

NestJS vs Express: Which One Should You Use?

If you’re building a Node.js backend, two names come up constantly: Express and NestJS. Express has been the default choice for over a…

Deploying a real-time multiplayer game on Railway

This post contains Railway referral links. If you sign up through one I get a bit of credit.

Stop Memorizing IP Ranges — Start Understanding Them

Why your IP address looks the way it does, and how under the hood bits turn into buildings.

Building BasniConnect: A Full-Stack Civic App for a Town of 60,000 People

How I built a real-time community platform using Flutter, Node.js, PostgreSQL, Supabase, Socket.IO, Redis, and Cloudflare R2 — designed to…

Why I Chose Express Again After Seriously Considering Fastify

Sometimes the best engineering decision isn’t choosing the newest technology. It’s understanding which problem you’re actually trying to…

My Node.js Middleware Was Running in the Wrong Order for Months. Nobody Noticed.

Express middleware order determines everything. My auth middleware ran after the request logger, leaking user tokens into plaintext logs…

NestJS Summed Up: The What, Why, and How

In this article, we’ll understand some of the most important NestJS concepts using simple language and practical examples instead of…

Nitro.js fixed my biggest issue with Node.js deployment.

Deploying Node.js has always been painful. Node.js needs to be present on the server, you need to install dependencies on the server, etc…

Tired of running out of cloud storage?

“Your cloud storage is at 98% capacity” or “Your iCloud is full” They’re the biggest companies in the world and we still have to pay ?

JavaScript Memory Leaks Nobody Talks About

JavaScript is not just for websites anymore. We use it on the frontend and on the backend too.

How to Build an Unrestricted Browser Automation AI Agent using Node.js,

In this full guide, you’ll learn:

Node.js vs NestJS: The Truth About Which One You Should Learn First

Most Developers Are Asking the Wrong Question and It’s Costing Them Months

When XPath Isn’t Enough: Detecting Canvas-Based UI Elements Using OpenCV and Node.js

As automation engineers, first instinct when interacting with a web application is to inspect the element and locate it using CSS…

The Calm Before the Storm... and the Calm After

BY ✍🏻 Rose AlMuhessen

I Tried Building an AI-Powered Google Meet Scheduler

You call, you talk, and it schedules the meeting. Made with Twilio, Gemini, and Google Calendar.

Building Vidiflow: A Production-Grade Video Downloader Backend in TypeScript

I just completed V2 of Vidiflow, a production-ready backend API for downloading videos from multiple platforms. Here’s the full story of…

Download all AWS S3 bucket folders in single script

9 Rules Every API Architecture Standard Should Define

The not so small decisions that keep your API from drifting.

How to Apply OWASP ASVS in Your Code, A Developer’s Verification Checklist

Mapping of OWASP ASVS requirements for auth, injection, CORS, business logic, request smuggling to real Express/Node examples, plus how to…