Systems

A bidirectional relationship — users know their rooms, rooms know their users — has to be updated under a single lock, or readers will catch it half-done.

A thread-safe Go library providing a reusable Room–User architecture for real-time systems like chat and multiplayer games.

Stability patterns and anti-patterns for systems that have to survive production.

Led an online poker platform with advanced tournament features and an event-driven backend for thousands of concurrent players.

Five-plus years on a real-money real-time poker platform: game logic, load testing at 10k+ concurrent users, disaster recovery, and a PHP → Node.js migration.