Full-Stack Software Developer (Java / React) (EN-IM-CAP-2026-245-GRAE)

CERN's Engineering Information Management group is looking for a Full-Stack Developer to join our dynamic development team. This role involves designing, developing, and maintaining software solutions that support engineering and information management processes.

Our applications play a critical role at CERN, enabling domain experts to evaluate intervention risks and grant access to our facilities. Approximately 600 such activities are declared every week, granting daily access to thousands of people who rely on our work for their safety.

The applications are built on a modern stack, including React, Java Spring Boot, Oracle, and BPMN. We are a small, focused team working with Agile processes that prioritise quality team communication and strong engagement with our users.

If you're passionate about software development and eager to work in a world-class research environment, we'd love to hear from you!

Your responsibilities:

• Develop and maintain applications using Java, React, and Oracle technologies.
• Collaborate with engineers and IT specialists to gather requirements and implement solutions.
• Ensure software quality through testing, debugging, and performance optimisation.
• Participate in Agile development practices within a fast-paced team.

Your profile:

• Experience developing Web Applications using modern front-end technologies (React, Angular, Vue JS) and Java back-end.

Skills:

• Familiarity with Java, React, and Oracle databases.
• Strong problem-solving skills and a proactive approach to learning.
• Ability to work in a collaborative, international environment.
• Desire to learn processes specific to CERN (Safety, Access, ...).
• Experience with Business Process Model and Notation (BPMN) 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, Electrical Engineering (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: 08.11.2026 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-January-2027

Job reference: EN-IM-CAP-2026-245-GRAE

Field of work: Information Technologies

Benchmark job: 200020 - Computing Engineer

Global Benefits

• A monthly net stipend of either 5266 or 5793 Swiss Francs per month 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