Senior Backend Engineer for AI Infrastructure & APIs

T-Systems Iberia is seeking a Lead Senior Backend Engineer to design and maintain scalable backend platform services behind AI inference endpoints. You will architect multi-tenant systems for authentication, API key management, usage metering, billing, and request proxy. Responsibilities include building core services with Python (FastAPI), implementing telemetry, security, and CI/CD pipelines, and collaborating with ML infrastructure teams to ensure secure, observable, and high-performance J-1…