Senior Python Backend Engineer

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.

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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 (unit/integration), CI/CD
• Git-based collaborative workflows
• Ability to work autonomously and take ownership of projects.

Experience with (Preferred but Not Mandatory)

• Exposure to Databricks / PySpark (or willingness to ramp up quickly).
• Experience designing and maintaining production-grade APIs.
• Experience with data platform modernization or migration projects.
• Experience with Azure services (e.g., App Services, Azure Functions, AKS, Storage, etc.).
• Knowledge of authentication and authorization mechanisms (OAuth2, OIDC, JWT).
• Familiarity with DevOps practices and infrastructure-as-code.
• Experience in financial services, risk, or data-intensive domains.

About You

You are a senior engineer who:

• Takes ownership and drives technical initiatives forward.
• Is comfortable working in a data-heavy environment.
• Balances pragmatism and engineering rigor.
• Enjoys modernizing legacy systems and improving architecture.
• Communicates clearly with both technical and non-technical stakeholders. xqbhyrx

This is an opportunity to play a key role in shaping the next-generation backend and data platform of our fintech organization.

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