How Face ID Works: Infrared Lasers & Neural NetworksTL;DR: Face ID does not compare standard selfies to unlock your phone. Instead, it projects 30,000 infrared laser dots onto your face to create a highly precise 3D geometry map. A neural network converts this map into a mathematical feature vector, c...May 11, 2026·5 min read
TCP: Why the Internet Works Even When It's BrokenTL;DR: TCP is how we send big files over a mess of unreliable cables. It chops data into numbered chunks and won't stop nagging the receiver until every single piece is accounted for. If a packet getsMar 28, 2026·5 min read
Fixing Biased Entropy: The Von Neumann Unbiasing TrickTL;DR: I've found that hardware entropy sources are rarely uniform. To solve this, I use Von Neumann Unbiasing, which pairs bits and discards identical results (00, 11). By mapping 01 to 0 and 10 to 1Mar 28, 2026·5 min read
Why Your Computer Can't Just Pick a Number: Navigating the Spectrum of RandomnessTL;DR: Computers are deterministic, meaning they struggle to create "true" randomness. I solve this using a spectrum of techniques: Pseudo-Random Number Generators (PRNGs) for logic like gaming, hardwMar 28, 2026·5 min read
The 'Top 1%' Hiring Myth: It’s a Ratio, Not a Talent RankTL;DR: When a company claims to hire the "top 1%," they are describing a recruitment ratio—one hire for every 100 CVs—not an objective ranking of talent. Engineering skill is context-dependent, meaninMar 28, 2026·4 min read
Git Internals: Why Your Commits Aren't Actually DiffsTL;DR: Git is a content-addressable filesystem that stores project states as full snapshots rather than incremental deltas. Every object—blobs, trees, and commits—is identified by a unique SHA-1 hash Mar 28, 2026·4 min read
Your JavaScript Array is a Hash Map in DisguiseTL;DR: JavaScript arrays are fundamentally objects where integer keys are treated as strings. To save performance, engines like V8 attempt to optimize these into contiguous memory blocks (Elements KinMar 28, 2026·5 min read
