CSChittaranjan Shitincsdev.hashnode.dev·May 28 · 10 min readHow Instagram Stores Reels, Photos, and Drafts Behind the ScenesFrom Camera Capture to Global Delivery: The Hidden Architecture of Modern Social Media Storage A user records a 45-second Reel while traveling on a train with unstable internet. The video includes: M00
CSChittaranjan Shitincsdev.hashnode.dev·May 26 · 11 min readHow WhatsApp Works Without Internet: Offline Messaging and Sync ExplainedWhy Your Message Still “Sends” Even in Airplane Mode Imagine this situation. You open WhatsApp inside a flight cabin after turning on airplane mode. You type: “I’ll reach tomorrow morning.” You pres00
CSChittaranjan Shitincsdev.hashnode.dev·May 20 · 13 min readExpo Router vs React Navigation — Which One Should You Use in 2026?Modern mobile applications are no longer simple collections of screens. Applications like Instagram, Uber, Netflix, banking apps, enterprise dashboards, creator platforms, AI assistants, and e-commerc00
CSChittaranjan Shitincsdev.hashnode.dev·May 20 · 11 min readHow Instagram, WhatsApp, Uber & Netflix Would Be Built Today Using Expo RouterModern mobile apps are no longer “screens connected together.” At scale, applications become distributed systems running inside a phone. The challenge is not rendering UI anymore. The real challenge i00
CSChittaranjan Shitincsdev.hashnode.dev·May 15 · 10 min readBuilding Pollify: Engineering a Real-Time Polling Platform That Handles Instant Feedback at ScaleModern internet products are no longer judged only by features. They are judged by responsiveness. Users expect every interaction to feel alive. The moment they vote, react, click, or respond — they e00
