~/oleksii-trofymenko · Lisbon · open to remote, EU and US hours
Oleksii Trofymenko Senior full-stack AI engineer. I ship web and mobile products end to end, and these are the ones I build on my own.
email github linkedin cv.pdf
25× faster key queries, p95 2.5 s → 100 ms
34→0 exposed data endpoints, GDPR
70→90% LLM eval pass rate in CI
4× fewer hotfixes after test rollout ## products
Football Card Fights in development · iOS + Android Real-time card duel built as a tug of war. One deterministic game engine runs on the server, on the phone and in the bot, so no rule is written twice.
Stack: Expo · Reanimated · Skia · TypeScript · WebSocket · PostgreSQL
[match screen]
[deck builder]
[goal moment]
Capsule in development · Web + iOS + Android An AI stylist that dresses you for an event within your budget. The model chooses the look; plain code guarantees the total never goes over budget. Every answer is traced and scored by evals.
Stack: React Native · Expo · Python · FastAPI · Go · PostgreSQL · pgvector · Ollama · Langfuse
## open source iOS and Android app with a REST API, built solo in 3 days. One Zod contract shared by the API and the forms.
Expo · NestJS · Prisma · PostgreSQL · Maestro
updated Oct 2026
source on github ↗