Java Engineer - Accelerator Controls; BE-CSS-DSP--GRAE

Job description

Within the Beams department, Controls Software and Services group, you will contribute to the evolution and consolidation of the operational tools used to control the accelerator complex. Working alongside a passionate team, you will help design and develop reliable backend solutions aligned with users' needs, supporting the operation of the world's largest particle physics laboratory.

• Contribute to the development, testing, and validation of software components of the CERN accelerator control system.
• Collaborate with stakeholders and users to understand requirements and support daily accelerator operations.
• Participate in the investigation, diagnosis, and resolution of operational problems in collaboration with physicists and accelerator operators.
• Collaborate with highly skilled software engineers both inside the BE-CSS group and across the CERN Accelerators & Technology sector.

• Initial experience in software development using Java/Spring.
• Experience writing clean, maintainable code and applying the related principles.
• Ability and motivation to learn and navigate large, complex codebases.
• Positive attitude and experience working in teams (academic or professional).

• Advanced knowledge of Java/Spring (Python is a plus).
• Concurrency and multithreading.
• Relational databases.
• Linux and container technology (Kubernetes is a plus).
• Testing, diagnosing and optimisation of software.
• Monitoring and troubleshooting of operational software systems.
• Spoken and written English, with a commitment to learn French.

• You are a national of a CERN Member or Associate Member State.
• By the Final date to receive applications, you have a maximum of two years of professional experience since graduation in Software Engineer (or a related field) and your highest educational qualification is either a Bachelor's or Master's degree.
• You have never had a CERN fellow or graduate contract before.
• Applicants without University degree are not eligible.
• Applicants with a PhD are not eligible.

• Job closing date:
  02.06.2026 at 23:59 CEST.
• Contract duration: 24 months, with a possible extension up to 36 months maximum.
• Working hours:
  
  40 hours per week.
• Job flexibility:
  Hybrid.
• Target start date: 01-September-2026.
• Job reference: BE-CSS-DSP--GRAE.
• Field of work:
  Software Engineering and IT.
• Benchmark job: 200020 - Computing Engineer.

• A monthly stipend between  Swiss Francs per month (tax free) depending on your degree.
• 30 days of paid leave per year plus 2 weeks annual closure.
• Coverage by CERN’s comprehensive health insurance scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund.
• Family, child and infant monthly allowances depending on your individual circumstances.
• A relocation package (installation grant and travel expenses) depending on your individual circumstances.
• Possibility to extend your contract up to 36 months.
• On-the-job and formal training including language classes.