AI Engineer · Prague
I build production software agent-first — coding agents write most of the code, I own the architecture, the review and what ships — and I build the harness that makes that reliable: conventions, skills, runbooks and evaluation loops.
At Medevio I ship AI features into a healthcare product used by clinics in Czechia and Slovakia. Ten years in QA and release engineering before that is why I measure what agents produce instead of trusting it.
Now
Medevio is a patient–doctor communication platform. I own the AI inside it, from prompt to rollout.
Selected work
Everything here is real and mine. Most of it runs on a Raspberry Pi at home.
One inbox for every channel I have to answer.
Slack, Gmail, ClickUp, GitLab and Signal in one self-hosted dashboard: reply, draft, react or mark done from one place, with triage rules that learn from what I mark important or spam. OAuth through a static relay page, tokens sealed at rest, Web Push to the phone.
Cheap turns on cheap models, the big model when it matters.
Per-turn model routing for Claude Code through one OpenRouter key: a local proxy classifies each request, picks the model and logs every decision. Zero-retention routing by design.
A real-estate watchdog that reads the ad text.
Scrapes four Czech property portals, normalises ads into PostgreSQL and extracts with an LLM what portals don’t categorise — pets allowed, no commission, brick or panel. Groups the same flat across portals, flags scam patterns and e-mails matching ads within minutes. Prepaid watchdogs through Stripe.
Hibernated on AWS since September 2026.
An AI guide to the Karlovy Vary film festival.
Crawls the festival programme, enriches films from TMDB, OMDB and ČSFD, embeds them and answers in chat: what to see tonight, what fits between two screenings, how far the venues are from each other. Per-user and global token budgets keep the bill predictable.
Runs during the festival in July; hibernated between editions.
Registrations for the kids’ board-game club I run.
Sign-up form behind a self-made dice captcha, a capacity that closes the form itself, attendance per lesson, articles, CSV export, nightly backups. Zero-dependency Node 22 with node:sqlite, in Docker behind a Cloudflare tunnel.
A community centre’s website its editors can run themselves.
Payload CMS and Next.js for a Prague community and cultural centre: events that fall into the archive by date, a Czech admin, drafts and versions, bilingual with Czech fallback, and roles an editor cannot escalate.
A Raspberry Pi that holds everything together.
A Signal assistant with local Czech speech-to-text, Gmail and Calendar tooling, a private family app and this site’s siblings — all in Docker behind one Cloudflare tunnel, with nightly restic backups to S3 and a watchdog that only speaks when a backup goes stale. AWS access bounded by IAM permission boundaries, every call audited.
More on GitHub: MCP servers, LangGraph examples, scrapers. github.com/jozso39
Before
AI Developer (robot_dreams, 2025) · CS50 (Harvard / edX, 2020)
Contact
Hiring, a project, or a question about any of this — write to me. The address is behind a small proof that you are not a robot harvesting e-mails:
Give my name its háček — drag the ˇ onto the C, or just tap the C.