Senior AI Backend Engineer

SIX • Madrid, Community of Madrid, Spain • Posted May 26, 2026

Location Madrid, Community of Madrid
Job Type Full-time
Category Computer Occupations
Posted May 26, 2026

What You Will Do


  • Productize AI & GenAI Solutions: Build the backends, agent/RAG infrastructure, MCP servers, and LLM-serving layers that turn models, prompts, and pipelines into reliable, observable production products.

  • Design & Build Production APIs: Architect and maintain endpoints and GraphQL APIs, defining schema, resolver, and authentication patterns that serve frontend applications, internal services, and AI features.

  • Integrate Data & AI Pipelines: Develop ingestion, parsing, OCR, and vendor-LLM integrations (OpenAI, Gemini, Anthropic) with strong attention to concurrency, async processing, retries, idempotency, and state-machine workflows.

  • Operate in Production: Partner with MLOps on Docker, Terraform, and Azure DevOps CI/CD; establish performance baselines and observability for both APIs and AI workloads; optimize for latency, throughput, and cost.

  • Champion Quality & Coach Peers: Apply clean architectur...
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