08/2026 — now
CurrentVienna, Austria · Remote
Founder & Product Engineer
Wingmate · airport social app · see the build
He designed and built a travel app end to end, from the product rules to the iPhone app, and runs it in production.
- Built the backend in Python and FastAPI, and kept every privacy rule in one tested module: mutual photo reveal, private seat numbers and automatic expiry after landing.
- Wrote 122 automated tests that must pass before any deploy. Deploys run through GitHub Actions to Fly.io, with Sentry monitoring and Litestream backups.
- Integrated the Claude API with schema-validated output, rate limiting and a fallback if the model fails.
- Built encrypted offline chat for the iPhone app with a custom Swift plugin (Multipeer Connectivity, Curve25519, ChaChaPoly).
- Ran a security review of the app himself and set up sign-in by email code and Google.