SRSaurabh Ravteinsaurabhravte.hashnode.dev·May 28 · 8 min readHow Instagram Stores Reels, Photos and Drafts Behind the ScenesYou hit record. You dance, lip-sync add a filter, trim a few seconds and tap Save Draft. Then life happens you close the app, your phone restarts,and two days later you open Instagram to find that Ree00
SRSaurabh Ravteinsaurabhravte.hashnode.dev·May 27 · 7 min readHow WhatsApp Works Without the InternetOpen WhatsApp on an airplane, type a message and hit send. Something remarkable happens: the message appears in the chat bubble immediately with a small clock icon beside it. You didn't have internet.00
SRSaurabh Ravteinsaurabhravte.hashnode.dev·May 22 · 12 min readHow Instagram, WhatsApp, Uber & Netflix Would Be Built Today Using Expo RouterWhy Simple Folder Structures Fail at Scale Every React Native project starts the same way. You scaffold an app, create a components/ folder, a screens/ folder, maybe a utils/ folder, and you're off. T00
SRSaurabh Ravteinsaurabhravte.hashnode.dev·May 21 · 5 min readExpo Router vs React Navigation - Which One Should You Use in 2026?What is Routing in Mobile Apps? In a web browser, routing is intuitive you type a URL, press Enter, and land on a new page. The URL itself is the address. On mobile, the equivalent concept is navigati00
SRSaurabh Ravteinsaurabhravte.hashnode.dev·May 7 · 5 min readHow React Virtual DOM works under the HoodProblem? Why direct DOM manipulation is painfully slow Imagine you're redecorating your house. Every time you want to move a single vase, you hire a full construction crew, tear down and rebuild the e10
