AI Engineer – LLM / Agentic Systems (f/m/x)

We are building a new AI team within a project in the digital healthcare / data-driven marketing domain. We are looking for both a Tech Lead and Senior Engineers who will work together as one cohesive team.

The role focuses on designing and delivering production-grade AI systems powered by LLMs in a real-world, regulated environment.

Your tasks

• Design and develop production-ready AI systems based on LLMs and agent-based workflows

• Build and maintain data pipelines for retrieval, orchestration, and evaluation

• Implement solutions using frameworks such as LangChain, LangGraph, LlamaIndex, or custom approaches

• Develop and optimize RAG pipelines (chunking, embedding, retrieval, reranking)

• Integrate LLM models (OpenAI and open-source) and support model selection decisions

• Collaborate with Data Science teams to productionize ML models

• Build evaluation frameworks (metrics, test sets, regression tests) and monitor system performance

• Create and maintain scalable AI infrastructure in a cloud environment

Requirements

• Minimum 5 years of commercial experience in software development or AI/ML engineering

• Strong Python skills with solid software engineering practices (modular design, testing, code reviews)

• Hands-on experience with LLM frameworks such as LangChain, LangGraph, or LlamaIndex

• Experience with vector databases (e.g., Pinecone, Weaviate, pgvector, OpenSearch)

• Practical experience building RAG pipelines and working with unstructured data

• Experience working with SQL and cloud-based data systems

• Availability to start within 2 weeks due to a fast project kickoff

• Fluency in English

• Residing in Poland required

What we offer 

• Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas 

• Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market 

• We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 

• Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more 

• Comfortable workplace – class A offices or remote work 

• Dozens of fascinating projects for prestigious brands from all over the world 

• PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers 

• Investment in your growth – meetups, webinars, training platform and technology blog – you choose 

• Fantastic atmosphere created by all Sii Power People 

If you want to work on systems with high operational significance — apply now!