AHArbab Hussainindesi-dev.hashnode.dev·May 27 · 5 min readHow Instagram Stores Reels, Photos, and Drafts Behind the ScenesWhen you upload a high-resolution 4K video or a 108 megapixel photo to Instagram or TikTok, the process feels instantaneous. You tap post, a loading ring fills up in seconds, and your media is live fo00
AHArbab Hussainindesi-dev.hashnode.dev·May 27 · 4 min readHow WhatsApp Works Without Internet: Offline Messaging and Sync ExplainedWhen you use an app like WhatsApp, you don't stop typing just because you entered a subway or an elevator. You expect to hit send, see a "pending" icon, and put your phone away, knowing the app will h00
AHArbab Hussainindesi-dev.hashnode.dev·May 27 · 7 min readExpo Router vs React Navigation - Which One Should You Use in 2026?When you build a web application using Next.js or Remix, you take file-system routing for granted. You create a file named about.tsx, and boom—you have an /about route. But for over a decade, mobile 00
AHArbab Hussainindesi-dev.hashnode.dev·May 27 · 9 min readHow Instagram, WhatsApp, Uber & Netflix Would Be Built Today Using Expo RouterWhen you are building a small hobby project in React Native, you can throw your files almost anywhere and things will work just fine. But when you scale up to apps like Instagram, WhatsApp, or Uber, a00
AHArbab Hussainindesi-dev.hashnode.dev·May 10 · 2 min readWhy Node.js is Perfect for Building Fast Web ApplicationsWhen people start learning Node.js, they often hear things like: Node.js is fast Node.js is single-threaded Node.js uses event loop But most beginners don’t understand why Node.js became so popul00
