Senior Fullstack · Solo Builder

Adrian Kujawski

I ship AI-native products solo — Flutter + Go + LLM integration.

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FLUTTER GO LLM INTEGRATION POSTGRES PRODUCTION-GRADE INFRA

Featured Work — Live

Geo Duelist

Real-time PvP with LLM-driven shape personalities. Every triangle remembers its last 5 fights.

A game I built solo end-to-end: Flutter web/iOS/Android, a Go backend with WebSocket matchmaking, PostgreSQL for shape memory, and Groq (llama-3.3-70b) for personalities. Zero infra cost on the free tier. The LLM interface is provider-swappable — switch to Ollama, Claude, or OpenAI with one line of code.

Flutter Go Groq LLM PostgreSQL
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What I Bring

Fullstack solo delivery

10 years shipping production code across mobile, web, and backend. Comfortable owning a feature from database schema to Flutter animation.

AI-native products

I don't just wire up OpenAI. I design provider-swappable LLM architecture with rate limiting, structured output validation, and graceful degradation.

Ships with observability

Every project I ship has monitoring, kill switches, and a self-verifying deploy pipeline from day one. No surprises.

Trajectory

2024 — now

Independent contractor

Building Geo Duelist · available for EU contracts.

2020 — 2024

Senior Engineer · [company name]

Led [technology] migration for [scale].

2016 — 2020

Fullstack Engineer · [company name]

Shipped [product] used by [scale].

2014 — 2016

Junior/Mid Engineer · [company name]

First production experience with [stack].

Open for Contract Work

Have a product to ship?

I take on 1–2 concurrent clients. Preferred setup: 3–6 month engagements, 20–30h per week, EU timezone friendly.

Email adriankujawski313@gmail.com

or reach me on LinkedIn ↗