Senior Software Engineer (FastAPI)

About us

comm1t is a specialist IT recruitment agency delivering top engineers across Poland and Europe 🇪🇺. We combine experienced recruiters with autonomous AI agents and an obsessive focus on quality — sourcing 24/7 across LinkedIn, GitHub, and beyond to reach engineers who aren't actively job hunting but are open to the right move.

We don't flood you with CVs. We get to know each candidate's skills, values, and goals, then send only the best-matched people — and we stay close through onboarding and the first months to make sure the placement lasts.

About the role

We're looking for fullstack engineers (preferably) — but if you're strong on the backend and don't feel at home on the frontend, that's completely fine too. What matters most is that you can own features end-to-end.

You'll build agentic AI workflows that let legal teams delegate complex, multi-step work — not just chat-based assistance, but real end-to-end execution on documents: review, drafting, analysis, anonymization, translation, and semantic search. Every step the platform takes has to be traceable, explainable, and secure, since we operate in regulated environments with sensitive client data.

The product handles large volumes of large legal documents, so scalability and performance are core, not afterthoughts. You'll work very closely with the product itself, with real ownership and impact on its direction. We're looking for top-tier engineers who ship high-quality code and challenge decisions rather than just close tickets.

Tech stack

• Backend: Python, FastAPI, Redis, SQL, NoSQL, Celery, Azure Cloud

• Frontend: React, Next.js, TypeScript, shadcn/ui, Zustand

Must-have

• Minimum 5-6 years of experience with Python and 3+ with FastApi

• Experience building scalable, robust backend systems within (or close to) the stack above

• Hands-on experience with AI tooling in your daily work (Claude Code, Cursor, etc.) — this is a hard requirement

• Comfort in a fast-paced, international startup environment

Nice to have

• Experience building LLM-powered features or workflows (OpenAI/Anthropic APIs, LangChain, agentic systems)