Python AI Developer

About the Position

We are seeking a Senior Python AI Developer with 5+ years of commercial experience in GenAI/LLM engineering to join our remote team in Polska.

Responsibilities

• Design and build Python services and APIs that wrap LLM-powered functionality.
• Build and maintain agentic and RAG pipelines: retrieval, reranking, tool-calling, multi-step reasoning, structured outputs.
• Care about quality beyond "it works" - evals, observability, and the data that tells you when something regresses.
• Work directly with clients: translate fuzzy business requirements into architecture decisions, and explain your technical tradeoffs to non-technical stakeholders.
• Work across a distributed, multi-market team and client organizations.

Requirements

• 5+ years commercial Python experience, including 3+ years of hands-on GenAI/LLM engineering.
• Solid engineering fundamentals: building scalable services/APIs (FastAPI, Flask, or Django), writing real test suites (pytest), clean and modular architecture.
• Hands-on experience building RAG pipelines - retrieval, embeddings, vector search.
• Working knowledge of agentic patterns: tool-calling, function-calling, multi-step reasoning workflows.
• Strong prompt engineering skills, including structured outputs (JSON schemas, Pydantic, Instructor or equivalent).
• Experience with at least one major cloud platform (AWS, Azure, or GCP), including its managed AI/ML services (e.g., Bedrock, Azure OpenAI).
• An "evals mindset" - you think about relevance, consistency, latency, and cost as real engineering concerns, not afterthoughts.
• High-proficiency written and spoken English - you'll use it daily with clients and teammates.

Nice to Have

• Experience with orchestration frameworks beyond the basics - LangGraph, LangSmith, LlamaIndex.
• Hands-on with a specific vector database (Pinecone, Weaviate, Milvus, pgvector) beyond "I integrated one once."
• Experience building evaluation frameworks or golden-dataset pipelines specifically (as opposed to just using one).
• Exposure to data pipeline work feeding AI systems - understanding how data quality/freshness affects model behavior.
• Prior client-facing / consulting experience in a professional-services or consulting setup.

We Offer

• A good and friendly atmosphere in the company and the satisfaction of working with both departmental colleagues and direct superiors.
• Large internal technology conferences, star parties, and team outings.
• Flexible working hours tailored to individual preferences. Remote or hybrid work options available.
• Clear, straightforward development paths: choose between a managerial or expert development path.
• Facilitation of desired competencies development, subsidized training, and courses.
• Many years of experience in the market and implementation of national and international projects.
• Free participation in language lessons for those who speak fluently and wish to maintain or develop their language skills.
• Attractively decorated relaxation areas, available in the company's largest branches, to encourage relaxation during the day, and equipped kitchens with aromatic coffee.
• Support for all passions, including soccer teams, marathon runners, and other active sports lovers.

About the Company

Join our team and be part of a unique atmosphere where you can grow professionally while enjoying a supportive and engaging work environment.