Software Developer (Java & Angular) (BE-GM-APC-2026-151-GRAP)

Drive the modernisation of CERN's Geodetic Metrology data management system, migrating legacy Oracle APEX/PL/SQL applications to a Java/Spring Boot and Angular platform, while leading the redesign of a mission-critical application for CERN's Accelerator Complex.

Your responsibilities

• Analyse Oracle APEX pages, processes and PL/SQL packages to understand business workflows and data dependencies.
• Implement Spring Boot REST APIs and Angular Frontend.
• Write automated tests and apply software quality practices.
• Participate in the whole software development lifecycle (requirements, design, development, testing), following a modern agile approach to ensure high-quality outcomes.
• Interact with the end-users of the services to understand their needs and help translate those into appropriate software solutions.
• Build strong partnerships with IT and multidisciplinary teams across CERN to ensure the delivery of reliable, maintainable, and scalable software solutions aligned with current needs and future strategic goals.
• This role includes team supervision responsibilities.

More information here.

Your profile

• Proven experience in designing and developing software applications using Java technologies and modern JavaScript/TypeScript frameworks.
• Practical experience with concurrent and multithreaded programming.
• Experience applying software quality assurance practices and using related tools (code review, preparing tests, deliver high quality documentation, unit tests, clean code, sonarqube).
• Experience in ICT systems architecture and design, including the design of scalable services and APIs.
• Familiarity with CI/CD pipelines and automated build, test, and deployment workflows.
• Experience with cloud-native technologies, including Kubernetes.
• Knowledge of Oracle APEX would be an asset.

Skills

• Strong knowledge of the Spring framework ecosystem.
• Strong knowledge of relational database systems, particularly Oracle Database, including proficiency in PL/SQL.
• Ability to design reliable software services following SOLID principles or similar best practices.
• Knowledge of software development lifecycle (SDLC) tools, methodologies, and procedures.
• Ability to deliver high-quality work on time and meet expectations.
• Contributes to a positive team environment through an optimistic and constructive attitude while proactively addressing issues.
• 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.
• You have a professional background in Software Engineering (or a related field) and have either:
  • a Master's degree with 2 to 6 years of post-graduation professional experience;
  • or a PhD with no more than 3 years of post-graduation professional experience.
• You have never had a CERN fellow or graduate contract before.

Job closing date: 06.10.2026 at 23:59 CEST.

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-November-2026

Job reference: BE-GM-APC-2026-151-GRAP

Field of work: Information Technologies

Benchmark job: 200020 - Computing Engineer

Global Benefits

• A monthly net stipend of either 6372 or 7004 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