Full-Stack Software Engineer (EP-CMO-2025-288-GRAE)
CERN - The European Research Center of Particle Physics
Employment Type: Full-time
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.
Your responsibilities
- 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.
Your profile
Experience:
- Design, implementation and testing of complex software systems.
- Usage of modern web tools and software development infrastructure and tools (git, Gitlab, JIRA).
- PostgreSQL, Oracle, and MySQL database development and administration.
- Modern programming languages and tools: Python, Django, Vue, PHP, Java, JSP.
- Providing direct support to end users.
Skills:
- Administration of databases.
- Full-stack software development.
- Basic Linux administration knowledge is a plus.
- 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 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.
Additional Information
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-2025-288-GRAE
Field of work: Software Engineering and IT
Benchmark job: 200020 - Computing Engineer
Global Benefits
- A monthly stipend between 5196-5716 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.
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
