Full-Stack Software Engineer; EP-CMO--GRAE

Job Description

CMS is one of the largest physics experiments of the Large Hadron Collider (LHC), located at CERN's Point 5 site in Cessy, France. The position involves contributing to the design, development, and maintenance of software and computing systems supporting the operation of the CMS experiment and communication within its user community. You will join the CMS Experiment Group (EP-CMO), which is responsible for developing and maintaining software tools that support the management, coordination, and daily operation of the CMS collaboration.

• Provide support to users of the current system, ensuring that issues are resolved promptly and new features are delivered as resources permit.
• Contribute to the transition from the existing Java/JSP-based system to the newly developed PHP/Python/Django/Vue-based system (GLANCE), ensuring a smooth experience for users.
• Collaborate with physicists and computing specialists to understand and implement new requirements.
• Act as the lead developer of the "Incubator" module to handle CMS-specific features within GLANCE.
• Contribute to the improvement of the documentation by gaining in-depth knowledge of both the old and new CMS management software suites.

• Design, implementation and testing of complex software systems.
• Usage of modern web tools and software development infrastructure and tools (git, Gitlab, JIRA).
• Postgre
  
  SQL, Oracle, and MySQL database development and administration.
• Modern programming languages and tools:
  Python, Django, Vue, PHP, Java, JSP.
• Providing direct support to end users.

• Administration of databases.
• Full-stack software development.
• Basic Linux administration knowledge is a plus.
• 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 Computer Science (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:
  29.01.2026 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-June-2026
• Job reference: EP-CMO--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.