Full-Stack Software Developer (EN-ACE-2025-260-GRAE)

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 19.12.2025, to 05.01.2025. 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.