C++ Software Engineer - European Organization for Nuclear Research (Geneva)

About this position

The summary below is published by European Organization for Nuclear Research on the official vacancy notice. Our own analysis — salary realism, comparable openings, career trajectory, language profile — follows further down the page.

Key responsibilities

According to the vacancy notice, the role centres on the following duties:

• Design, develop, document, and maintain modern C++ control software for power converter systems
• Take ownership of software components throughout their lifecycle, including migration of applications to the FGCDv2 framework
• Contribute to the evolution of the FGCDv2 framework by identifying, implementing, and validating improvements
• Support software architecture, code quality, and CI/CD practices to ensure reliable, scalable, and maintainable solutions
• Collaborate closely with software engineers, equipment specialists, and operational teams to deliver robust control applications
• Team supervision responsibilities

Are you eligible?

Check these requirements from the notice before investing time in an application:

• Education: Master's degree with 2 to 6 years of post-graduation professional experience, or PhD with no more than 3 years of post-graduation professional experience
• Experience: Professional background in Software Engineering or related field; 2 to 6 years post-graduation professional experience (Master's) or no more than 3 years (PhD); experience designing, developing, and maintaining medium-to-large software systems
• Languages: English (spoken…), French (commitm…)
• Key skills: Modern C++, Linux Software Development, Code Quality and Testing Practices, Software architecture, CI/CD practices, Effective communication, Multidisciplinary team collaboration
• Eligibility: National of a CERN Member or Associate Member State; never had a CERN fellow or graduate contract before

Contract and working arrangements

Contract duration: 24 months, with a possible extension up to 36 months maximum.

Working arrangements: Hybrid.

Hiring unit: EPC-CCS (Energy, Power Conversion and Electrical Systems - Control and Cryogenics Systems).

Position details

Reference

SY-EPC-CCS-2026-115-GRAP

Last Verified

20 July 2026

Position overview

This is the official EU Careers listing for C++ Software Engineer at CERN based in Geneva (Other). The vacancy reference is SY-EPC-CCS-2026-115-GRAP. The role falls under the Research domain.

As a Software Engineer, you will engage in the development, evolution, and long-term maintenance of C++ software solutions running in Linux environments. Working within a collaborative team of software engineers and domain experts, you will contribute to the core control applications that govern more than 5,000 power converters across the accelerator complex.

A central aspect of this role is the ownership and modernisation of a set of software classes that support accelerator operations. You will take responsibility for migrating these classes from the existing FGCDv1 and FESA architectures to the next-generation FGCDv2 framework. This work offers a unique opportunity to combine hands-on software development with framework evolution: as you migrate and modernize your assigned components, you will contribute directly to the refinement and completion of the FGCDv2 framework, helping shape its future direction based on practical experience and operational needs.

Your responsibilities

* Design, develop, document, and maintain modern C++ control software for power converter systems. * Take ownership of software components throughout their lifecycle, including the migration of applications to the FGCDv2 framework. * Contribute to the evolution of the FGCDv2 framework by identifying, implementing, and validating improvements based on practical experience. * Support software architecture, code quality, and CI/CD practices to ensure reliable, scalable, and maintainable solutions. * Collaborate closely with software engineers, equipment specialists, and operational teams to deliver robust control applications. * This role includes team supervision responsibilities.

More information [here](https://epc-ccs.web.cern.ch/).

Your profile

* Strong proficiency in modern C++ and Linux-based development environments. * Experience designing, developing, and maintaining medium-to-large software systems, applying software quality practices such as testing, code review, continuous integration, and maintainability. * Ability to take ownership of technical deliverables, communicate effectively, and collaborate within multidisciplinary teams. * Interest or experience in hardware-software integration, industrial systems, or control systems would be an asset.

You will have the opportunity to gain further experience with:

* GitLab and modern CI/CD workflows. * Meson build system. * Static code analysis, sanitisers, and modern development tooling (Clang ecosystem). * Python development and testing frameworks (pytest, Jinja).

Skills

* Modern C++. * Linux Software Development. * Code Quality and Testing Practices. * Spoken and written English, with a commitment to learn French.

Eligibility criteria:

* You are a national of a [CERN Member or Associate Member State](https://home.cern/about/member-states). * You have a professional background in Software Engineering or related (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: 20.07.2026 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-October-2026

This position involves:

* Stand-by duty, when required by the needs of the Organization.

Job reference: SY-EPC-CCS-2026-115-GRAP

Field of work: Software Engineering and IT

Benchmark job: 200020 - Computing Engineer

Global Benefits

* A monthly stipend between 6372-7004 Swiss Francs per month (tax free) 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](https://careers.cern/)

Application timeline

This vacancy was first listed on 7 July 2026, 16 days ago.

No closing date is published in the source feed for this position. EU vacancies typically remain open for four to eight weeks; check the official vacancy notice for the cut-off date and time.

Last verified against the EU Careers feed on 20 July 2026 (2 days ago).

Where to learn more

For headcount, mission, and other open vacancies at CERN see the CERN institution page; for the cost of living, correction coefficient, and other postings in Geneva see our Geneva location page; for related vacancies in the Research field browse our Research domain page.

New to EU careers? Our beginner's guide walks through entry routes, EPSO competitions, and what to prepare. For application logistics see application tips and EPSO competitions.