Building scalable products, clean systems, and thoughtful experiences.

I design reliable software across web, mobile, and cloud. Explore the latest insights, engineering notes, and a focused portfolio of production work.

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Apr 22, 202601

How Big Tech Checks Username Uniqueness at Billion-User Scale

When you type a username and instantly see 'already taken', there's a multi-layer stack doing the work: a probabilistic filter, an in-memory cache, a distributed index, and a load balancer in front of all of them. This post breaks down each data structure, its trade-offs, and how Google, Meta, and Amazon combine them to answer one simple yes/no question in milliseconds across billions of users.

Apr 21, 202602

15 Data Structures Every Developer Should Actually Understand

From arrays to LRU caches, these 15 data structures sit underneath your database, your browser, your OS scheduler, and your favorite frameworks. This post walks each one — how it works, what it costs, where it shows up in production — with Mermaid diagrams, code, and a big-O cheat sheet at the end.

Apr 17, 202603

31 WordPress Plugins, One Flippa Sale, and an 8-Month Time Bomb

In April 2026, WordPress.org closed 31 plugins after an attacker bought a trusted plugin portfolio on Flippa, shipped a dormant PHP deserialization backdoor, and activated it eight months later — with command-and-control resolved through an Ethereum smart contract. This post breaks down how the attack actually worked, why 96% of WordPress vulnerabilities live in plugins, and how Cloudflare's new EmDash CMS attempts to fix the architecture with capability-scoped sandboxes.

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Mar 23, 202601

Nvidia Just Made AI Agents Enterprise-Ready. Here's What Actually Happened.

Jensen Huang called OpenClaw 'the most important software release, probably ever' — comparing it to Linux, HTML, and Kubernetes in the same breath. Bold claim. But after digging into what Nvidia actually built around it, I think he might be right.

Mar 17, 202602

5 Brutal Truths Nobody Taught Me About Programming (But Should Have)

I've been writing code for years. Read the books. Studied the patterns. Nailed the algorithms. And yet — the lessons that actually made me a better developer? None of them came from a textbook. Every single one came from something breaking, a user doing something unexpected, or me staring at a screen at midnight wondering where it all went wrong.

Mar 16, 202603