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commercetools is seeking a Senior AI Engineer to own AI capabilities end-to-end in a full-stack role. You will design and build agent loops and orchestration systems, including tool use, structured outputs, business-rule enforcement, and graceful failure handling. Your responsibilities include building integration layers via MCP that enable agents to securely call backend systems and business APIs, rendering model output into live, streamed, accessible UI via generative-UI protocols, and grounding models in real data through retrieval, embeddings, and feedback loops.
You will treat evaluations as a first-class system, focusing on provable improvement rather than intuition-based decisions. The role requires taking capabilities from prototype stage to measured, guard-railed production features. This is a full-time hybrid position based in Munich (with flexibility for Berlin, Boston, Durham, London, or Valencia).
You bring 5+ years of shipping production software, with at least 2+ years building with LLMs in production for real users. You have hands-on experience with UI protocols such as A2UI, AG-UI, or MCP-UI, and you've built against generative/agent-driven UI protocols rather than just consuming REST APIs. Your technical foundation includes prompt and context engineering, agents, tool use, structured outputs, evals, and fluency with MCP in both Python and TypeScript/Node with React. You're comfortable with async patterns, streaming, and observability tooling. You also have working fluency with retrieval systems, embeddings, and SQL.
You've shipped full-stack applications to production and owned them end-to-end—from frontend through backend to deployment and operations—rather than handing off at layer boundaries. You're a creative problem-solver wired to find solutions, confidently diving into complex challenges and making them simple for others. Your curiosity drives continuous growth and contribution to an environment of trust and teamwork.
