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@faisalsiddiqui

faisal Siddiqui

@faisalsiddiqui·New Delhi·Joined January 2026

Faisal

About

Full Stack Dev & Technical Writer | React · JS · AWS · Docker | Writing what I learn | Open for freelance article writing

Available for

open for Freelance Work, Technical Content Writing , Web Developer

faisal Siddiqui's blogs

CodeWithFaisalfaisalsiddiqui.hashnode.dev67 posts

About

Full Stack Dev & Technical Writer | React · JS · AWS · Docker | Writing what I learn | Open for freelance article writing

Available for

open for Freelance Work, Technical Content Writing , Web Developer

faisal Siddiqui's blogs

CodeWithFaisalfaisalsiddiqui.hashnode.dev67 posts

Articles Comments

Recently published

FSfaisal Siddiquiinfaisalsiddiqui.hashnode.dev·2d ago · 10 min read

How Instagram Stores Reels, Photos, and Drafts Behind the Scenes

Journey of Recording a Reel and Saving It as a Draft When you record a Reel on Instagram, much more happens than simply saving a video. The app continuously stores data so you don't lose your progress

FSfaisal Siddiquiinfaisalsiddiqui.hashnode.dev·2d ago · 20 min read

How Instagram, WhatsApp, Uber & Netflix Would Be Built Today Using Expo Router

A Simple Scenario: Sending a Message in Airplane Mode Imagine you're chatting with your friend while traveling. Suddenly, your flight takes off, and you switch your phone to Airplane Mode, which disab

FSfaisal Siddiquiinfaisalsiddiqui.hashnode.dev·3d ago · 10 min read

Realtime Systems: Polling, WebSockets, SSE, and Pub/Sub

1. What Makes a System "Realtime"? What Does Realtime Mean in Software Systems? A realtime system is a software system that can deliver updated information to users quickly, as events happen, without

FSfaisal Siddiquiinfaisalsiddiqui.hashnode.dev·3d ago · 14 min read

Building Scalable Systems: Caching, Rate Limiting and Observability

1. Why Applications Need to Scale Scalability means an application's ability to handle more users, requests, and data without becoming slow or unavailable. What Scalability Means When an application b

FSfaisal Siddiquiinfaisalsiddiqui.hashnode.dev·3d ago · 9 min read

How React Works Internally: Virtual DOM, Reconciliation, and Rendering

1. Why React Needed a New Rendering Approach As web applications became more complex, updating the user interface directly using the browser's DOM (Document Object Model) became difficult and sometime