Backend Software Engineer - Data Processing Platform (BE-CSS-DSP-2026-126-LD)

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.

Job Description

Introduction:

You will contribute to the design, development, testing and maintenance of the Data Processing Platform (DPP), used for both offline and online analysis of accelerator and beam data. Working within the Agile Data Processing team of the CERN Controls Software & Services group, you will help build reliable and scalable backend services supporting the control, monitoring and analysis of particle accelerators and equipment.
You will participate in the validation and evolution of the platform architecture, develop production-ready integrations, and contribute to the modernisation of existing services through the migration of legacy systems to the DPP.

Functions:

• Design, develop, and maintain mission-critical software components for the DPP.
• Conduct technological watch and evaluate emerging technologies to ensure high-quality solutions aligned with CERN’s evolving accelerator controls environment.
• Collaborate with stakeholders, including end users, Product Owners, and infrastructure providers, to gather requirements and define solutions.
• Support accelerator equipment experts, physicists, and operation crews by improving and optimising their experience with the platform and associated software services.

Qualifications

Master's Degree or equivalent relevant experience in the field of Computer Science or a related field.

Experience:

• Proven solid experience in software development using Java .
• Hands-on experience with  Python .
• Strong knowledge of the Spring Framework ecosystem.
• Practical experience with concurrent and multi-threaded programming.
• Good understanding of distributed systems and JVM internals.
• Experience applying software quality assurance practices and related tools.
• Familiarity with CI/CD pipelines and automated build, test, and deployment workflows.
• Experience with cloud-native technologies, including Kubernetes, is highly desirable; familiarity with Knative or similar framework would be considered an asset.

Technical competencies:

• Knowledge of programming techniques and languages: design dependable software services. following SOLID principles or similar.
• Architecture and design of ICT systems: designing scalable services and APIs.
• Identification and selection of relevant emerging ICT technologies.
• Knowledge and application of software life-cycle tools and procedures.

Behavioural competencies:

• Demonstrating Accountability: working conscientiously and reliably; delivering on promises.
• Achieving Results: delivering high quality work on time and fulfilling expectations.
• Working in Teams: contributing to promoting a positive atmosphere in the team through an optimistic and constructive attitude; addressing issues.
• Solving Problems: adopting a pragmatic approach; understanding the value of adopting generic rather than ‘gold -plated' technical solutions.

Language skills:

• Spoken and written English, with a commitment to learn French.

Additional Information

Eligibility and closing date:

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. We welcome applications from all Member States and Associate Member States .

This vacancy will be filled as soon as possible, and applications should normally reach us no later than 07.07.2026 at 23:59 CEST.

Employment Conditions:

Contract type: Limited duration contract (5 years). Subject to certain conditions, holders of limited-duration contracts may apply for an indefinite position.

Working Hours: 40 hours per week

Job Flexibility: Hybrid

Job grade: 6-7

Job reference: BE-CSS-DSP-2026-126-LD

Field of work: Software Engineering and IT

Benchmark Job Title: Computing Engineer

Global Benefits

• A competitive salary (tax free), increasing in line with your years of relevant experience.
• 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, removal, travel expenses) depending on your individual circumstances.
• Possibility to extend your contract up to 8 years + eligibility for indefinite contract tenure.

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