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~/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.

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

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

pet-watch

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 ↗