Java Engineer - Accelerator Controls (BE-CSS-DSP-2026-137-GRAE) at CERN

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. Your responsibilities • 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.More information here. Your profile • 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).Skills • 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.Eligibility criteria: • You are a national of a CERN Member or Associate Member State. • By the application deadline, 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.