SPSharath P Dinnetphull.hashnode.dev·Jul 1 · 10 min readHow ChatGPT Understands Your Questions?Have you ever wondered what happens after you type a question into ChatGPT? You write a sentence in plain English, click Send, and within seconds you receive a detailed, natural response. It almost fe00
SPSharath P Dinsystem-thinking.hashnode.dev·May 31 · 10 min readHow Instagram Stores Reels, Photos, and Drafts Behind the ScenesYou open Instagram, record a 15-second Reel, add music, maybe apply a filter, and then decide not to post it yet. Instagram asks: “Save draft?” You tap Yes. Later, you completely close the app. Maybe 00
SPSharath P Dinsystem-thinking.hashnode.dev·May 31 · 9 min readHow Messaging Apps Work Offline: The System Design Behind Instant MessagesYou turn on airplane mode, open a chat app, type: “I reached.” You tap Send. Surprisingly, the message instantly appears in the conversation even though your phone has no internet connection. How is00
SPSharath P Dinnetphull.hashnode.dev·May 21 · 10 min readExpo Router vs React Navigation: Which One Should You Use in 2026?If you started building React Native apps a few years ago, there is a very high chance you learned navigation using React Navigation. For a long time, it was the standard solution for moving between s00
SPSharath P Dinscripts-core.hashnode.dev·May 21 · 10 min readHow Instagram, WhatsApp, Uber & Netflix Would Be Built Today Using Expo RouterModern mobile apps are no longer “just screens.” Apps like Instagram, WhatsApp, Uber, and Netflix are massive systems with millions of users, realtime infrastructure, offline capabilities, scalable na00
