Full-Stack Software Developer

Our Engineering Department (EN) is looking for a Computing Engineer to join our Accelerators, Coordination, and Engineering Group (ACE). The ACE Group is in charge of the coordination of the activities for the interventions and changes to the LHC and its injectors. As part of the EN-ACE group, you will engage in the development and enhancement of software solutions for the group. This includes participating in the complete lifecycle of software development.

Kindly note that CERN will be closed from , to Feedback on your application will be provided after this period.

Your responsibilities

As part of the EN-ACE group, you will:

• Maintain and develop EN-ACE applications (database, back-end, front-end) to add new features for users (example here).
• Ensure the coordination, the scheduling and the deviation control of several software packages.
• Use your knowledge and experience to suggest new ideas and novel features (e.g. virtual reality, AI).
• Ensure the integration of EN-ACE applications with other CERN tools.
• Participate in testing and reviewing code, prepare technical and end-user documentation.
• Visit the CERN accelerators (PS-Complex, SPS-Complex, LHC) for in-site works, e.g. to capture panoramas (immersive pictures).
• Provide user support when required.

More information here.

Your profile

• Proficiency in Java application development.
• Proficiency in JavaScript frontend development.
• Experience with relational databases and SQL.
• Knowledge in designing and evolving client-oriented APIs, ideally REST-based.
• Familiarity with software quality assurance techniques and tools.

Skills

• Java, JavaScript/TypeScript, React, SpringBoot.
• Relational databases (Oracle).
• Python would be an advantage.
• Spoken and written English or French, with a commitment to learn the basics of the other language.

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 Computing/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: 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: Hybrid

Target start date: 01-February-2026

This position involves:

• Work in Radiation Areas.
• Interventions in underground installations.

Job reference: EN-ACE GRAE

Field of work: Software Engineering and IT

Benchmark job: Computing Engineer

What we offer

• A monthly stipend ranging between 5196 and 5716 Swiss Francs (net of tax).
• Coverage by CERN's comprehensive health scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund.
• Depending on your individual circumstances: installation grant; family, child and infant allowances; payment of travel expenses at the beginning and end of contract.
• 30 days of paid leave per year.
• On-the-job and formal training at CERN as well as in-house language courses for English and/or French.

About us

At CERN, the European Organization for Nuclear Research, physicists and engineers are probing the fundamental structure of the universe. Using the world's largest and most complex scientific instruments, they study the basic constituents of matter - fundamental particles that are made to collide together at close to the speed of light. The process gives physicists clues about how particles interact, and provides insights into the fundamental laws of nature. Find out more on

Diversity has been an integral part of CERN's mission since its foundation and is an established value of the Organization. Employing a diverse workforce is central to our success.