We're looking for a Senior Python Developer to join our team in Madrid or Barcelona, Spain in a hybrid working mode. In this role, you will design and implement secure, high-performing backend services that enable generative AI-driven applications across Azure. You will develop GraphQL APIs, optimize relational database structures and integrate AI/LLM functionalities to deliver scalable solutions.

Join a cutting-edge AI platform initiative where your backend engineering expertise will power secure, scalable and innovative AI solutions, improving enterprise productivity and enabling next-generation services. You’ll work closely with DevOps/MLOps teams and data scientists to operationalize advanced AI capabilities in a production environment.

Responsibilities

• Design, build and maintain GraphQL APIs using FastAPI and Strawberry
• Integrate AI and LLM APIs (e.g., OpenAI, Anthropic) into backend services with secure data handling
• Architect relational database schemas and implement version-controlled migrations for consistency and performance
• Collaborate with DevOps/MLOps teams to containerize and deploy services on Azure
• Monitor, troubleshoot and optimize backend performance for speed, scalability and cost efficiency
• Implement unit and integration tests to ensure reliability and maintainability
• Apply best practices for API security, performance tuning and error handling
• Participate in CI/CD processes and improve observability for production systems

Requirements

• Degree in Computer Science, Software Engineering or related field
• Proven experience as a Python Developer building backend services with FastAPI
• Hands-on experience developing GraphQL APIs with tools such as Strawberry
• Strong knowledge of SQL and relational database design; experience with ORMs (e.g., SQLAlchemy)
• Familiarity with integrating AI/LLM APIs and Model Context Protocol (MCP)
• Proficiency in Git, Docker and CI/CD fundamentals
• Understanding of performance optimization, scalability and monitoring practices
• Strong problem-solving skills and ability to work independently and collaboratively
• Excellent English communication skills

Nice to have

• Experience with vector databases or RAG (Retrieval-Augmented Generation) pipelines
• Hands-on experience deploying applications in Microsoft Azure environments
• Familiarity with observability tools and logging frameworks

We offer

• Private health insurance
• EPAM Employees Stock Purchase Plan
• 100% paid sick leave
• Referral Program
• Professional certification
• Language courses

EPAM is a leading digital transformation services and product engineering company with 61,700+ EPAMers in 55+ countries and regions. Since 1993, our multidisciplinary teams have been helping make the future real for our clients and communities around the world. In 2018, we opened an office in Spain that quickly grew to over 1,450 EPAMers distributed between the offices in Málaga, Madrid and Cáceres as well as remotely across the country. Here you will collaborate with multinational teams, contribute to numerous innovative projects, and have an opportunity to learn and grow continuously.

• Why Join EPAM
• WORK AND LIFE BALANCE. Enjoy more of your personal time with flexible work options, 24 working days of annual leave and paid time off for numerous public holidays.
• CONTINUOUS LEARNING CULTURE. Craft your personal Career Development Plan to align with your learning objectives. Take advantage of internal training, mentorship, sponsored certifications and LinkedIn courses.
• CLEAR AND DIFFERENT CAREER PATHS. Grow in engineering or managerial direction to become a People Manager, in-depth technical specialist, Solution Architect, or Project/Delivery Manager.
• STRONG PROFESSIONAL COMMUNITY. Join a global EPAM community of highly skilled experts and connect with them to solve challenges, exchange ideas, share expertise and make friends.