Senior Python Developer - Freelance

Technologies we use

About the project

This is how we organize our work

This is how we work

Your responsibilities

• Salary range: up to 150 PLN/h
• Contract: Freelance B2B
• Start date: ASAP
• Engagement: full-time, 3 months
• Location: Remote (based in PL only)
• Polish language is a must-have
• Project is building an AI agent that works on a system that processes images.

Our requirements

• Commercial experience building AI agents in production (not just PoC/demo), with strong Python skills (async, typing, tests).
• Hands-on experience with agentic frameworks (e.g. LangGraph, LangChain, CrewAI, AutoGen, Pydantic AI) or the ability to build agentic loops without framework.
• Experience working with LLM SDKs (Anthropic, OpenAI).
• Experience implementing MCP (Model Context Protocol) servers and/or clients.
• Experience with vector databases (pgvector, Qdrant, Weaviate, Pinecone) and PostgreSQL, including hybrid search.
• Polish language at C2 (native) level.

Optional

• Experience with TypeScript/Node for the application layer.
• Familiarity with evaluation/tracing tools such as LangSmith, Langfuse, Braintrust, or OpenTelemetry.
• Infrastructure experience: Docker, CI/CD, AWS/Azure/GCP, Bedrock/Vertex.
• Knowledge of the AI Act and GDPR, for the purpose of auditing agentic solutions.
• English language at B2+/C1 level.

What we offer

• 100% remote, flexible work.
• Work with an experienced team of developers and continuous development of your hard and soft skills.
• Dev-friendly processes such as Continuous Integration, Continuous Delivery, Code Review and bug bashes.
• Long-term collaboration on challenging products (FinTech, B2B software, E-commerce and more).