Backend / API Engineers (Mid to Staff level) - Fintech Platform (Madrid / Hybrid)
E-Frontiers
Full-time
Other-General
Location
madrid, madrid, Spain
Posted
July 13, 2026
Job Description
Weโre hiring 4 Backend Engineers (Mid, Senior, and Staff levels) to join a high-impact API Platform team building scalable, self-serve infrastructure used by both customers and internal product teams. This is a rare opportunity to join a fast-growing fintech environment where the API is a top business priority and sits at the core of the companyโs platform modernisation strategy. Madrid (Hybrid: 4 days in office / 1 day remote ) Mid / Senior / Staff) Improving performance, observability, reliability, and developer experience Backend: Python, Django, REST APIs Data: PostgreSQL, Redis Infrastructure: AWS, Docker, Kubernetes, Terraform IAM concepts (Keycloak or similar is a plus) Design and build scalable backend services and APIs Own services end-to-end (โyou build it, you run itโ) Mentor more junior engineers (Senior+ levels) Help shape a modern platform used at global scale Strong software engineering fundamentals (algorithms, design patterns, architecture) Comfortable working in cloud...