PMPritam Mandalinwebdev101.hashnode.dev·May 28 · 7 min readHow Instagram Stores Reels, Photos, and Drafts Behind the ScenesModern social media apps handle billions of photos, videos, reels, and stories every day. Platforms such as WhatsApp, Instagram, and Facebook must store, process, upload, sync, and deliver huge amount00
PMPritam Mandalinwebdev101.hashnode.dev·May 28 · 8 min readHow WhatsApp Works Without Internet: Offline Messaging and Sync ExplainedModern messaging apps are expected to work almost everywhere, even in poor network conditions. Users often open a chat app in airplanes, underground trains, rural areas, or during unstable mobile data00
PMPritam Mandalinwebdev101.hashnode.dev·May 21 · 6 min readHow Instagram, WhatsApp, Uber & Netflix Would Be Built Today Using Expo RouterModern mobile applications are no longer simple collections of screens connected with basic navigation. Apps like Instagram, WhatsApp, Uber, and Netflix operate at enormous scale with millions of conc00
PMPritam Mandalinwebdev101.hashnode.dev·May 19 · 7 min readExpo Router vs React Navigation - Which One Should You Use in 2026?Routing is one of the most important architectural decisions in a React Native application. It affects how screens are organized, how developers scale projects, how authentication flows are implemente00
PMPritam Mandalinwebdev101.hashnode.dev·May 10 · 6 min readSessions vs JWT vs Cookies: Understanding Authentication ApproachesAuthentication is one of the most important parts of modern web development. Whenever users log into a website, mobile app, or API, the system needs a reliable way to identify who they are and maintai00
