We are looking for a Senior Python Backend Engineer to increase the bandwidth on key backend and data-related projects as we modernize our platform within a fast-growing Fintech environment. This role is highly impactful: you will contribute evolving existing Python applications, help migrate legacy SQL Server processes to a modern Databricks-based architecture, and contribute to cloud-native solutions running in Azure. You will work closely with technical leadership and have strong influence over architectural decisions and best practices. Role Description This is a full-time hybrid role located in the Greater Madrid Metropolitan Area, with work-from-home flexibility. As a Senior Python Backend Engineer, you will: * Own and evolve existing Python backend services and data processes. * Design and implement REST APIs using modern Python frameworks. * Work extensively with Python’s scientific libraries for data processing and business logic. * Contribute to the migration of SQL Server–based processes to Databricks (PySpark). * Design scalable,



containerized applications deployed in Azure. * Collaborate with data engineers, frontend developers, and business stakeholders. * Ensure high standards in code quality, testing, CI/CD, and software architecture. * Participate in the definition of technical improvements across backend and data systems. Required Qualifications * Higher education in Computer Science, Engineering, or a related field. * 5+ years of experience as a backend or software engineer. * Strong expertise in Python for backend and data-heavy applications. * Solid hands-on experience with: * pandas for data manipulation and transformation * REST frameworks such as FastAPI or Django * SQL (strong understanding of relational databases, ideally SQL Server / MSSQL) * Experience working in cloud environments (preferably Azure). * Experience building and deploying containerized applications (Docker required; Kubernetes is a plus). * Strong understanding of software

📌 Senior Python Backend Engineer (Madrid)
🏢 LumRisk
📍 Madrid