Job Description T-Systems is at the forefront of innovation, delivering advanced technology solutions across sectors including automotive, healthcare, and public services. Our AI Foundation Services team builds the platform infrastructure that powers AI inference at scale, including API gateways, authentication, billing, and multi-tenant serving. designs and builds high-performance backend systems and APIs that power intelligent applications across diverse industries. We cultivate a collaborative engineering culture where technical depth creativity and ownership technical expertise drive real-world impact.

Role Overview We are looking for a senior backend engineer highly skilled Python Developer with strong system design skills and experience building production infrastructure deep experience designing, building, and scaling distributed systems and APIs.



In this role, Y y You will ou will own architect and drive the evolution of the maintain backend platform behind our AI inference endpoints - a multi-tenant system handling authentication, API key management, usage metering, billing and request proxy services that enable high-availability, data-intensive AI-powered solutions. The role is high-ownership and you will shape architecture decisions, raise the bar of engineering quality and build systems that are performant, secure and observable at scale. You’ll collaborate with experts in AI infrastructure and data engineering to build robust, secure, and efficient systems th

📌 Lead Senior Backend Engineer (m/f/d) (Bilbao)
🏢 T-Systems
📍 Bilbao