Ivan Golosinda

I’m a Senior Full-Stack Engineer with 7+ years shipping production systems in healthcare, SaaS, and AI infrastructure. I build reliable web platforms end-to-end, balancing fast iteration with the operational stability teams need.

At Theoria Medical, I consolidated infrastructure from 90 servers to 5, and helped resolve a critical missing-notes incident as a key contributor. I also built an AI-powered ICD-10 search that every provider uses for clinical documentation—mapping natural-language queries to correct codes to reduce noting time and coding errors.

I’ve owned high-impact billing workflows, including automated billing responsible for ~80% of Theoria’s revenue by aggregating cross-department data and delivering it to external partners. I’ve also built developer tooling like a feature-flag and UAT system from scratch to support safer gated rollouts.

Earlier, at Petchef, I built a pet meal subscription platform from the ground up as the sole developer—covering the Next.js customer portal, Vite admin dashboard, and Express/GraphQL API in a TypeScript monorepo. I implemented Stripe subscription billing, integrated key third parties, and deployed on VPS infrastructure with Node.js cluster mode and real-time Socket.IO notifications.