Software Developer - Beam Optics (BE-ABP-LNO-2026-132-GRAP)

Job Description

Join the Linear and Non-Linear Optics (LNO) Section within CERN's Accelerator and Beam Physics (ABP) Group and help shape the future of the High-Luminosity Large Hadron Collider (HL-LHC). As part of the Optics Measurement and Correction (OMC) team, you will develop advanced software and analysis tools that enable precise beam-optics measurements and corrections, as well as improve commissioning procedures.

Your work will play a key role in ensuring the safe, reliable, and high-performance operation of the HL-LHC, contributing directly to the successful delivery of its novel physics programme.

Your responsibilities

• Maintain and extend the core OMC framework and toolset used during LHC commissioning and operation.
• Explore software solutions to improve the efficiency and capability of optics measurement and corrections in the LHC.
• Update accelerator model creation and correction algorithms to utilise new simulation tools.
• Explore the viability of automation for key measurement and analysis workflows, implementing solutions where possible.
• Develop new GUIs and analysis tools to be used in the CERN Control Centre during optics commissioning.
• Participate in, and contribute to the analysis of, optics measurements in the CERN accelerators.

Your profile

• Background in programming and software design, with experience in Python.
• Familiarity with version control systems and collaborative workflows (Github).
• Experience of GUI development.
• Knowledge of particle accelerator physics and operation would be an advantage.

Skills

• Software development. in Python.
• GUI development
• Ability to test, diagnose and optimise existing software.
• Structured approach towards work, good prioritisation skills to deliver results on required time-lines.
• Ability and willingness to share knowledge and participate in knowledge transfer activities.
• Strong teamwork and communication skills.
• Interest in developing and maintaining software solutions for applied physics, particularly the field of accelerator physics.
• Spoken and written English or French, with a commitment to learn the other language.

Eligibility criteria:

• You are a national of a CERN Member or Associate Member State.
• You have a professional background in Physics, Software Engineering (or a related field) and have either:
  • a Master's degree with 2 to 6 years of post-graduation professional experience;
  • or a PhD with no more than 3 years of post-graduation professional experience.
• You have never had a CERN fellow or graduate contract before.

Additional Information

Job closing date: 30.09.2026 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-January-2027

This position involves:

• Work during nights, Sundays and official holidays, when required by the needs of the Organization.

Job reference: BE-ABP-LNO-2026-132-GRAP

Field of work: Applied Physics

Benchmark job: 200140 - Applied Physicist

Global Benefits

• A monthly stipend between 6372-7004 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.

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