CSChittaranjan Shitincsdev.hashnode.dev·Jun 30 · 9 min read How ChatGPT Actually Understands Your QuestionsIntroduction: The Illusion of Conversation When you type a question into ChatGPT, the experience feels magical. It feels like talking to a human mind. It understands nuance, context, and even jokes. B00
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
