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Geohash Explained: How Facebook and Uber Find Nearby Friends and Cabs
1h ago · 4 min read · How Facebook finds your nearby friends or how uber gets you the nearby cab? The answer is geo hash and quad tree. There is also something called Google S2. How does a geo hash works? Our problem state
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Product Experimentation for Collaborative AI Features: Cluster Randomization for LLM-Based Tools in Python
1h ago · 22 min read · Every product experimentation team running causal inference on LLM-based collaborative features eventually hits the same wall: your users aren't independent. Your team ships an AI meeting summarizer t
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How We Built a Progressive Proxy Upload Architecture for Multi‑GB PSD & RAW Files
1h ago · 6 min read · How we made 30 GB PSD uploads feel instant without expensive backend conversions. When we first built our media upload system, the architecture looked completely normal. A user uploaded a file, the b
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How Instagram, WhatsApp, Uber & Netflix Would Be Built Today Using Expo Router
1h ago · 17 min read · You've built a to-do app. Maybe a weather app. Your folder structure was simple: a screens/ folder, a components/ folder, and everything just worked. Then you try to build something real — something w
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Expo Router vs React Navigation — Which One Should You Use in 2026?
2h ago · 11 min read · Introduction Navigation is one of the most important parts of every mobile application. Whether it is Instagram, WhatsApp, Uber or Netflix — users constantly move between screens. Examples: Login → H
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Forecast Cone: A Grand Theorem for Computable Software Evolution
3h ago · 14 min read · TL;DR This article starts from the ForecastCone in Software Field Theory (SFT), then reads modularity, technical debt, review, governance, and learning as parts of one research program. The goal is si
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Expo Router vs React Navigation - Which One Should You Use in 2026?
3h ago · 8 min read · If you build React Native apps long enough, eventually you realize: navigation is not just “moving between screens”. It’s actually: moving between screens while preserving application state That soun
Join discussionWhatsApp Says No One Can Read Your Messages. A Federal Agent Spent 10 Months Disagreeing.
4h ago · 9 min read · The Texas lawsuit against Meta isn't really about whether WhatsApp's encryption is broken. It's about whether the label matches the product -- and for the two billion people who trust it with sensitiv
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