Jonatan Tibarovsky

I built and deployed DentalAI, a multi-tenant SaaS where an LLM agent handles dental booking conversations in Hungarian over SMS, checks Google Calendar availability, and confirms appointments. I shipped it solo, from TypeScript services and Stripe billing to the Next.js/React product, onboarding, dashboard, demo, and internal CRM.

At WithU and 10xU, I led the platform behind a UK fitness app serving 500,000 registered users. I owned serverless systems processing 1.8M API requests per day, improved reliability to 99.95% uptime, cut AWS spend by 35%, and built real-time heart-rate telemetry for up to 4,000 concurrent users.

Most recently, I owned RepCon, a live rep-counting and leaderboard experience delivered across Samsung and LG smart TVs, Android TV, Fire TV, mobile, web, and CMS controls. I built pose tracking, scoring and replay rules, AWS IVS live broadcast delivery, device pairing, synchronisation, and Firestore-backed event controls.

I've also delivered products for the NHS Jobs portal, Porsche, M&C Saatchi, Planet Super League, and startups using React, AWS, GraphQL, and serverless infrastructure. I enjoy building practical AI products and reliable systems that can move quickly from idea to production.