@ashikunnabi

Md Ashikun Nabi

@ashikunnabiDhaka, BangladeshJoined January 2026

Turning software ideas into maintainable, production-ready systems

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Md Ashikun Nabi's blogs

Engineering Notes by Nabiblogs.ashikunnabi.com21 posts

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MAMd Ashikun Nabiblogs.ashikunnabi.com3d ago · 4 min read

Why Git Commit Hashes Are Always 40 Characters Long

If you've used Git for more than a day, you've probably seen something like this: 3f5e7c9a2b4d6e8f1a0b2c3d4e5f67890ab1c2de It's always... 40 characters. Not 32. Not 64. Exactly 40. Coincidence? Not a

MAMd Ashikun Nabiblogs.ashikunnabi.comAug 2 · 5 min read

Database Indexes Aren't Just About Which Columns You Index. They're Also About the Order

But here's something many developers overlook: INDEX(name, age) is NOT the same as INDEX(age, name) They contain the same columns. Yet one might make your query run in milliseconds, while the other

MAMd Ashikun Nabiblogs.ashikunnabi.comJul 11 · 5 min read

CORS Explained: Why Browsers Block Cross-Origin Requests

If you've worked with APIs, you've almost certainly seen a CORS error in your browser console. It usually appears at the worst possible moment—your API works in Postman, but fails in the browser. The

MAMd Ashikun Nabiblogs.ashikunnabi.comJul 11 · 6 min read

Building Real-Time Applications: WebSockets vs Polling vs Server-Sent Events (SSE)

Modern applications are expected to update instantly. Whether it's a chat application, stock market dashboard, live order tracking, multiplayer game, or notification system, users expect information t

MAMd Ashikun Nabiblogs.ashikunnabi.comJun 8 · 6 min read

Scalability Basics: Why Your App Works for 100 Users but Fails at 100,000

When developers first build an application, scalability is rarely the biggest concern. The application works. Users can log in. Orders can be placed. Data is stored correctly. Life is good!! Then some

Md Ashikun Nabi

About

Available for

Md Ashikun Nabi's blogs

Recently published

Why Git Commit Hashes Are Always 40 Characters Long

Database Indexes Aren't Just About Which Columns You Index. They're Also About the Order

CORS Explained: Why Browsers Block Cross-Origin Requests

Building Real-Time Applications: WebSockets vs Polling vs Server-Sent Events (SSE)

Scalability Basics: Why Your App Works for 100 Users but Fails at 100,000

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Md Ashikun Nabi

About

Available for

Md Ashikun Nabi's blogs

Recently published

Why Git Commit Hashes Are Always 40 Characters Long

Database Indexes Aren't Just About Which Columns You Index. They're Also About the Order

CORS Explained: Why Browsers Block Cross-Origin Requests

Building Real-Time Applications: WebSockets vs Polling vs Server-Sent Events (SSE)

Scalability Basics: Why Your App Works for 100 Users but Fails at 100,000