MSMohd Sameerinmohd-sameer.hashnode.dev·May 31 · 7 min readBehind the Feed: How Instagram Stores Reels, Photos, and DraftsImagine you are shooting a Reel. You record a 30-second clip, add music, overlay some text captions, and apply a filter. Just before hitting "Share," you hesitate—it needs a final polish tomorrow. You00
MSMohd Sameerinmohd-sameer.hashnode.dev·May 31 · 9 min readHow WhatsApp Works Without Internet: Offline Messaging and Sync ExplainedImagine you are boarding a flight. You switch your phone to Airplane Mode, cutting off all cellular and Wi-Fi networks. You open WhatsApp, type a quick message to a colleague—“Just boarding, will upda00
MSMohd Sameerinmohd-sameer.hashnode.dev·May 23 · 9 min readReact Navigation vs. Expo Router: The Ultimate Architectural GuideIf you have built cross-platform mobile apps for any length of time, you know that managing how users move between screens is one of the most deceptively complex parts of the job. In a web application00
MSMohd Sameerinmohd-sameer.hashnode.dev·May 23 · 10 min readReact Native Architecture at Scale: From Expo Router to Production EngineeringIn the early days of a mobile app’s lifecycle, architecture is often treated as a luxury. Teams value velocity over strict organization, structuring their projects around simple, type-based directory 00
MSMohd Sameerinmohd-sameer.hashnode.dev·May 9 · 4 min readUnderstanding the this Keyword in JavaScriptIf there is one concept in JavaScript that has caused more headaches than any other, it’s the this keyword. To a beginner, it feels like a mischievous ghost that changes its identity depending on whic00
