Junior Software Engineer (TE-MPE-CB-2026-16-GRAE)

Job Description

Are you interested in building reliable, large-scale control and data systems for one of the world's most complex scientific machines? In this role, you will contribute to the redesign and deployment of the LHC Post-Mortem system, a critical infrastructure used to analyse and understand machine events such as beam losses, magnet quenches, and beam dumps.

You will work on the evolution of the system towards a modern, scalable architecture based on streaming technologies, long-term data storage, and containerised services, ensuring high performance, reliability, and readiness for future LHC operation. As part of CERN's Machine Protection and Electrical Integrity Group, you will collaborate closely with engineers, physicists, and operations teams to support safe and efficient accelerator operation during Run 4 and beyond.

Your responsibilities

• Develop and maintain robust Java services (using Spring Boot) and client libraries (Java and C++) based on the existing PM system code, ensuring high reliability and maintainability.
• Leverage DevOps practices to automate deployment, monitoring, and scaling of the new system in a Kubernetes environment.
• Create comprehensive test suites to validate the system's functionality and performance under real-world scenarios and throughput requirements.
• Implement a data migration solution to transition from the legacy Oracle-based storage to the new long-term storage.
• Collaborate closely with stakeholders and system clients to understand and meet their requirements, ensuring seamless integration with existing workflows.

More information here .

Your profile

Skills

Eligibility criteria :

Additional Information

Job closing date : 26.02.2026 at 23 : 59 CET.

Contract duration : 24 months, with a possible extension up to 36 months maximum.

Working hours : 40 hours per week

Job flexibility : Fully Onsite

Target start date : 01-April-2026

Job reference : TE-MPE-CB-2026-16-GRAE

Field of work : Software Engineering and IT

Benchmark job : 200020 - Computing Engineer

Global Benefits

Overview of CERN - Discover a world where the impossible is made possible!

At CERN, the European Organization for Nuclear Research, we are pushing the frontiers of science and technology. Our groundbreaking work brings together not only physicists but also a diverse range of professionals from engineering, technical, scientific, and administrative fields. Together, we foster an environment where innovation and collaboration thrive.

Every day, we face exciting new challenges and opportunities to contribute to cutting-edge research that shapes our understanding of the universe. We meet these challenges through the diverse perspectives within our teams, ensuring every contribution is valued and driving our shared sense of inclusion and purpose. Diversity is a core value of CERN since its foundation, and it remains central to our mission and continued success.

If you are ready to be part of a dynamic, inclusive community pushing the boundaries of knowledge, CERN is the place where your curiosity and skills can thrive. Be part of our mission to uncover what lies at the heart of the universe!  TAKE PART!

More information about us, here : careers.cern