Senior AI Engineer

At Avenga, we believe that human creativity empowers technology that matters. Operating globally, our 6000+ specialists provide a full spectrum of services, including business and tech advisory, enterprise solutions, CX, UX and Ul design, managed services, product development, and software development.

This is the job

You'll be working on the core engine of a production AI assistant, developing Agentic AI solutions using RAG and LLM orchestration to enable the assistant to move beyond answering questions and safely execute real customer requests.

This is you

• 3+ years building production Python services (async, API design)
• Experience designing and building REST APIs (and consuming them); comfortable with request/response modelling, auth, and versioning
• Hands-on experience building RAG / retrieval-augmented generation systems: not just calling an LLM API, but chunking, retrieval, and grounding answers in sources
• Experience with any vector database (e.g. Milvus, Pinecone, Weaviate, Qdrant, pgvector) and an understanding of embeddings and similarity search
• Worked with an LLM provider (OpenAI / Azure OpenAI / Anthropic / open models) in production
• A habit of evaluating output quality, you can explain how you measured whether a RAG system was good
• Writes automated tests as a matter of habit unit and integration testing with pytest (mocking, fixtures) Comfortable with GitHub in a team workflow, feature branches, pull requests, and code review

• LlamaIndex (or LangChain) framework experience
• Milvus specifically
• Azure OpenAI deployments
• LLM observability / tracing (Langfuse, LangSmith, OpenInference) FastAPI, Pydantic
• WebSocket / streaming APIs for real-time chat responses
• API tooling and testing: Bruno / Postman, OpenAPI/Swagger; API gateways
• Async & parallel testing and mocking AWS
• Modern Python tooling: uv, ruff, ty/mypy, pre-commit
• CI/CD with GitHub Actions, and trunk-based development with Conventional Commits
• AWS (ECS/Fargate, Secrets Manager), Terraform, Docker
• Multilingual NLP (Dutch/English)

At Avenga, everyone matters. We provide equal opportunities in recruitment, career development, and leadership, regardless of race, ethnicity, gender identity, sexual orientation, disability, age, religion, or any other characteristic. We are committed to fostering a work environment where our diverse community of employees, candidates, and business partners actively shapes our growth. By bringing together people from different backgrounds and experiences, we build a workplace where everyone feels free to be themselves while honoring the boundaries of others.