🌀 Node.js Event Loop: Microtasks vs Macrotasks (Explained with Fun!)

If you’ve been working with Node.js and sometimes wonder “Why does my Promise run before my setTimeout?”, or “Why did this async callback execute earlier than I expected?” — it’s all thanks to the...

GPT-5 Prompting Guide (Simplified & Practical)

Why This MattersGPT-5 is more sensitive than past models to how you ask.The way you write the prompt — tone, structure, and clarity — can make or break the quality of the answer.1. Core Rules...

Building great SDKs

As devs, we use software development kits (SDKs) to build any and all functionality for apps. Want to build a cloud service on AWS? You’ll use the AWS SDK. Integrating Stripe to an app? It will be...

Why uv is Killing Traditional Python Tooling (And Why You Should Care)

The Python tooling ecosystem has been a mess for years. pip is slow, poetry is bloated, pipenv is abandoned, and pyenv barely works on Windows. Enter uv — a single Rust binary that's about to make...

When Your CS Professor Was Wrong: Arrays Beat Sets (Sometimes)

Or: How I learned to stop worrying and love O(n)Remember that smug feeling when you learned about Big O notation? When you could finally look at someone using array.includes() and think "pfft, O(n)...

Google Gemini CLI Cheatsheet

The Gemini CLI is an open-source AI agent that brings the power of Gemini directly into your terminal, allowing you to perform a wide range of tasks such as coding, problem-solving, and...

🔀 Git Rebase

"Git is easy," they said. "Just rebase it," they said.Next thing I know, I’m rewriting history like a time-traveling developer with commitment issues.This is a story about how I went from:git pull...

System Design 101 : From a Beginners POV

I really like to talk about system with people who are either really great at designing it or with peeps who are just getting started with this topic. For me System is very much vast topic to learn...

System Design For Beginners: Everything You Need in One Article

There is no pre-requisite to read this blog. Everything is written for complete beginners.This is a detailed blog that covers all the topics you need to master to solve any system design...

Production Best Practices: Security on Express.js

OverviewThe term â€śproduction” refers to the stage in the software lifecycle when an application or API is generally available to its end-users or consumers. In contrast, in...

Instagram’s Backend Architecture

As Instagram grew into a platform handling billions of interactions daily, it required a robust, scalable, and efficient backend architecture. The system needed to process a huge number of user...

Optimization Strategies for Django

Django is a high-level Python web framework that encourages rapid development and clean, pragmatic design. However, there are times when this "batteries-included" framework can feel slow or...