AI Engineer
commercetools4 hours ago
Valencia, SpainSenior
Responsibilities
- Build agent loops and orchestration for tool use, structured outputs, business-rule enforcement, and graceful failure.
- Build secure MCP integrations that allow agents to call backend systems and business APIs.
- Render model output into live, streamed, accessible interfaces using generative UI protocols.
- Ground models with retrieval, embeddings, and feedback loops.
- Create evaluation systems that measure and demonstrate improvement.
- Take AI capabilities from prototypes through guarded, measured production features and operate them in production.
Requirements
- Ship and own full-stack applications in production end to end, from frontend and backend through deployment and operation.
- Have 5+ years of production software experience and 2+ years building LLM systems in production for real users.
- Have hands-on experience with a generative or agent-driven UI protocol such as A2UI, AG-UI, MCP-UI, or a similar protocol.
- Have experience with prompt and context engineering, agents, tool use, structured outputs, evaluations, MCP, Python, TypeScript/Node, React, asynchronous programming, streaming, and observability.
- Have working fluency with retrieval, embeddings, and SQL.
- Preferred: experience with fine-tuning or distillation, e-commerce or marketplace systems, and 0-to-1 product development.
Benefits
- Comprehensive health benefits for employees and dependents, including personalized mental health support through OpenUp.
- Annual learning budget, self-paced learning platforms, language training, personalized coaching, mentorship, and leadership programs.
- Additional fully paid parental leave through Family Leave Plus.
- Equity participation program.
- Full-time hybrid work based in Berlin, Munich, London, or Valencia.
Tech Stack
Categories
About commercetools
commercetools builds a cloud-native, API-first commerce platform used by enterprises to run B2C and B2B storefronts across channels. Its SaaS products provide headless commerce, catalog, checkout, and order management that developers integrate via microservices and SDKs, sold by subscription with enterprise support. Founded in 2010 and headquartered in Munich, it serves global brands; public references include Sephora, Volkswagen Group, NBCUniversal, and Danone.