Backend Software Developer (Java/Python)

About the role

You will join the Data Processing team of the CERN Controls Software & Services group to design, develop, test and maintain the Data Processing Platform (DPP). Working in a Scrum environment, you will help build reliable, scalable backend services that support the control, monitoring and analysis of particle accelerators.

Key responsibilities

• Contribute to the design, development, testing and maintenance of DPP software components.
• Collaborate with senior developers and stakeholders to gather requirements and implement robust solutions.
• Participate in platform evolution by adding new features, integrations and improving existing services.
• Engage in software quality activities such as code reviews, debugging and documentation.
• Assist in modernising legacy systems through migration to the DPP.

Required profile

• Experience in software development using Java and Python.
• Interest in software quality practices, testing methodologies and maintainable design.
• Willingness to learn cloud‑native technologies and modern platforms.
• Fluent in spoken and written English; commitment to learn French.
• National of a CERN Member or Associate Member State with up to two years of professional experience after graduation.

Required skills

• Object‑oriented programming (Java, Python)
• Concurrent programming and distributed systems concepts
• Spring Framework ecosystem (Spring Boot)
• Version control systems (e.g., Git)
• CI/CD concepts and automated development workflows
• Kubernetes, Knative (or similar cloud‑native technologies)
• Monitoring and logging tools such as Prometheus, Grafana, ELK Stack

What we offer

• 24‑month fixed‑term contract with possible extension up to 36 months.
• Hybrid work model (onsite and remote).
• Opportunity to work on cutting‑edge accelerator data processing at a world‑leading research institution.