I'm Ruslan. I came into software through competitive programming: ACM ICPC World Finals Silver Medalist, later coach of a team that won World Finals gold, 5,000+ algorithmic problems along the way. After that: 15 years of commercial work, 80+ shipped projects across ML systems, backends and automation. Now I help founders and developers whose AI-built apps - Lovable, Replit, Bolt, Cursor, Claude Code - work in the demo but wobble in production. Broken login, a database anyone can read, payments that fail quietly. I find these problems before your users do, and I teach you to fix them. Most of my work is written and async: you send the code, you get back a clear report with priorities. If you prefer a live session, we share a screen and fix things together. Outside work: I've spent 20 years around competitive programming - solving, then coaching.