How Instagram Stores Reels, Photos, and Drafts Behind the ScenesYou spend twenty minutes recording the perfect Reel, save it as a draft, close the app, go to sleep. Next morning — it's still there, exactly as you left it. That experience feels simple. Underneath iMay 31 · 8 min readhow-instagram-stores-data.hashnode.dev
How WhatsApp Works Without Internet: Offline Messaging and Sync ExplainedYou tap send. The message sits there with a single grey tick. You land, turn off airplane mode and suddenly everything swooshes through. How did WhatsApp do that? Most people assume messaging apps neeMay 31 · 11 min readoffline-messaging-and-sync.hashnode.dev
Frontend Rendering Strategies Every Developer Must UnderstandEvery app you've ever built uses one of these. Here's what actually happens under the hood, why it matters at scale and how to pick the right one. A) Client-Side Rendering(CSR) The browser does all tMay 24 · 10 min readfrontend-rendering-strategies-by-koushik.hashnode.dev
What is Middleware in Express and How It WorksEvery request that hits your Express server passes through a pipeline before it reaches your route handler. Middleware is what lives inside that pipeline. Think of it as a series of checkpoints, each May 10 · 5 min readwhat-is-middleware-in-express-by-koushik.hashnode.dev
REST API Design Made Simple with Express.jsEvery time your app loads data, submits a form or deletes a record, it is talking to an API. REST is the set of rules that makes that conversation clean and predictable. This guide shows you exactly hMay 10 · 5 min readrest-api-design-made-simple-with-expressjs-by-koushik.hashnode.dev
