--- title: "Ankur Kumawat (@ankurxdev) | Hashnode" description: "Ankur Kumawat (@ankurxdev) writes on Hashnode. Read their latest articles and follow their work." url: "https://hashnode.com/@ankurxdev" --- @ankurxdev # Ankur Kumawat @ankurxdev · Joined January 2026 [Website](https://ankurkumawat.in/) ### [How Instagram Stores Reels, Photos, and Drafts Behind the Scenes](https://hustlecoderankur.hashnode.dev/how-instagram-stores-reels-photos-and-drafts-behind-the-scenes?utm_source=hashnode&utm_medium=feed) A beginner-friendly system design breakdown of what actually happens when you record a Reel, edit a photo, save a draft, and scroll through your feed all without thinking about any of it. Start Here: 13 min read · [hustlecoderankur.hashnode.dev](https://hustlecoderankur.hashnode.dev/how-instagram-stores-reels-photos-and-drafts-behind-the-scenes?utm_source=hashnode&utm_medium=feed) [May 31](https://hashnode.com/posts/how-instagram-stores-reels-photos-and-drafts-behind-the-scenes/6a1c29c3afe323ba992897f7) ### [How WhatsApp Works Without Internet: Offline Messaging and Sync Explained](https://hustlecoderankur.hashnode.dev/how-whatsapp-works-without-internet-offline-messaging-and-sync-explained?utm_source=hashnode&utm_medium=feed) You're on a train, signal drops to zero, and you hit send on a WhatsApp message. The app doesn't crash. It doesn't say "failed." It just shows a single grey tick and a few minutes later, when connecti 9 min read · [hustlecoderankur.hashnode.dev](https://hustlecoderankur.hashnode.dev/how-whatsapp-works-without-internet-offline-messaging-and-sync-explained?utm_source=hashnode&utm_medium=feed) [May 31](https://hashnode.com/posts/how-whatsapp-works-without-internet-offline-messaging-and-sync-explained/6a1c200599cfcad53bb38580) ### [How Instagram, WhatsApp, Uber & Netflix Would Be Built Today Using Expo Router](https://hustlecoderankur.hashnode.dev/how-instagram-whatsapp-uber-netflix-would-be-built-today-using-expo-router?utm_source=hashnode&utm_medium=feed) how apps like Instagram, WhatsApp, Uber, and Netflix can be architected using Expo Router in 2026. 11 min read · [hustlecoderankur.hashnode.dev](https://hustlecoderankur.hashnode.dev/how-instagram-whatsapp-uber-netflix-would-be-built-today-using-expo-router?utm_source=hashnode&utm_medium=feed) [May 23](https://hashnode.com/posts/how-instagram-whatsapp-uber-netflix-would-be-built-today-using-expo-router/6a1132af1f237623ea6595d3) ### [Expo Router vs React Navigation: Which One Should You Use in 2026?](https://hustlecoderankur.hashnode.dev/expo-router-vs-react-navigation-which-one-should-you-use-in-2026?utm_source=hashnode&utm_medium=feed) Compare Expo Router & React Navigation Learn difference in routing, performance, scalable, developer experience & which is best for React Native app 13 min read · [hustlecoderankur.hashnode.dev](https://hustlecoderankur.hashnode.dev/expo-router-vs-react-navigation-which-one-should-you-use-in-2026?utm_source=hashnode&utm_medium=feed) [May 23](https://hashnode.com/posts/expo-router-vs-react-navigation-which-one-should-you-use-in-2026/6a1122881f237623ea5c12da) ### [Async Code in Node.js: Callbacks and Promises](https://hustlecoderankur.hashnode.dev/async-code-in-node-js-callbacks-and-promises?utm_source=hashnode&utm_medium=feed) If you've been writing Node.js for even a short time, you've noticed something — almost nothing happens immediately. Reading a file, querying a database, making a network request — everything takes ti 6 min read · [hustlecoderankur.hashnode.dev](https://hustlecoderankur.hashnode.dev/async-code-in-node-js-callbacks-and-promises?utm_source=hashnode&utm_medium=feed) [May 10](https://hashnode.com/posts/async-code-in-node-js-callbacks-and-promises/6a009828e3eebc2e208daa61)