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 engineering principles:
Testing (uni

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