How real systems work: Google Maps, Aadhaar, Meta StyleX, DRM, and more. Engineering decisions at scale.
7 blog posts
How Aadhaar's ABIS deduplicates biometrics at billion scale: fingerprint templates, iris codes, sharded search, multi-engine consensus, and score fusion.
How Lottie works: JSON After Effects timelines rendered by cross-platform runtimes. Why Airbnb chose vector JSON over GIF and video for UI animations.
Why Picture-in-Picture can bypass DRM black-screen protection in browsers: compositor paths, Widevine L3 vs L1 decode routing, and why 4K stays stubborn.
How Meta StyleX compiles JS-authored styles into atomic static CSS: less runtime injection, smaller bundles, and why that matters for huge apps.
Rapido's fixed 4-digit Rapid PIN vs dynamic OTP: UX, SMS cost, and why physical pickup context matters more than brute-force odds.
Live traffic in Google Maps: how probe data, graph routing, Waze-style reports, and historical speed curves combine to show jams and update ETAs at huge scale.
Why streaming apps go black on screen capture: EME, CDMs, Widevine L1 vs L3, and the secure compositor paths that keep decrypted frames off the capture surface.
