Java Software Engineer (BE-CSS-DSPGRAE)

Join our team of experienced software engineers in the Controls Software and Services (CSS) group and take an active role in the design and development of two mission-critical systems that keep CERNs accelerators running safely 24/7.

You will contribute to the modernisation of the Technical Infrastructure Monitoring (TIM) system built upon the C2MON framework. TIM supervises cooling ventilation electricity and cryogenics installations across the CERN complex.

You will also contribute to the consolidation of the LHC Alarm Service (LASER) the centralised alarm platform serving the entire CERN accelerator chain.

Your responsibilities:

• Participate in the full software development lifecycle from requirements gathering and architecture design through development testing and deployment following agile practices.
• Design and develop Java/Spring Boot backend services for: alarm data acquisition from various sources (e.g. OPC-UA JMS MQTT) data processing data routing and long-term data archiving (big data storage).
• Design and develop event streaming pipelines using Apache Kafka to reliably ingest and distribute high-throughput alarm and monitoring data across system components. Design develop and evolve REST APIs consumed by monitoring dashboards and downstream systems such as expert applications and other microservices.
• Build and maintain CI/CD pipelines using GitLab CI.
• Write automated unit and integration tests to ensure high software quality.
• Collaborate with accelerator operators and system owners to understand operational needs and translate them into robust software solutions.

More information here.

Your profile:

• Background in backend software development or a closely related role.
• Good understanding of distributed systems microservices and event-driven architectures (e.g. message brokers).
• Exposure to data processing concepts and streaming frameworks (e.g. Apache Kafka) would be an asset.

Skills:

• Experience in core Java and its ecosystem.
• Hands-on exposure to the Spring Framework including Spring Boot.
• Knowledge of REST API design and development.
• Familiarity with Git and CI/CD pipelines and tools.
• Familiarity with containerisation and orchestration tools (e.g. Docker/Podman Kubernetes).
• Experience with SQL-based databases would be an asset.
• Working knowledge of Python and its ecosystem would be an asset.
• 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 Software Engineering (or a related field) and your highest educational qualification is either a Bachelors or Masters 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: 27.05.2026 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-September-2026

Job reference: BE-CSS-DSPGRAE

Field of work: Software Engineering and IT

Benchmark job: 200020 - Computing Engineer

Global Benefits

• A monthly stipend between 5266-5793 Swiss Francs per month (tax free) depending on your degree.
• 30 days of paid leave per year plus 2 weeks annual closure.
• Coverage by CERNs 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:

Remote Work :

No

Employment Type :

Full-time