Software Engineer

What you'll do

We are looking for a skilled Software Engineer to support the integration, automation, and maintenance of web-based applications within a large-scale technical infrastructure. The role involves full-stack development, third-party software integration, and close collaboration with both technical and non-technical stakeholders.

Learn more

Your responsibilities

Integrate third-party software into CERN's infrastructure using standardised APIs and technologies.
Ensure the reliable and stable operation of third-party software.
Act as a technical liaison with third-party software suppliers and CERN for troubleshooting, bug resolution, and development follow-up.
Automate administration and operational tasks for third-party software through standardised APIs.
Design, develop, and maintain web-based applications supporting operational and administrative workflows.
Capture user requirements, design solutions, implement automation tools, and present results to end users.
Develop and maintain automated tests, ensuring reliability and long-term maintainability.
Produce and keep up to date technical documentation and user-facing documentation.
Report on development progress and document implementation decisions.
Demonstrate developed solutions to both technical and non-technical audiences.

Still here? Let's make a quick check about

Your profile

Proven experience in development and maintenance of web-based applications.
Strong backend development experience using Java 11+
Experience with Spring Boot and JPA/Hibernate.
Hands-on experience with database integration (Oracle, PostgreSQL, or equivalent relational databases).
Experience developing and consuming RESTful APIs.
Frontend development experience with Angular (latest versions) or an equivalent modern framework.
Experience with full-stack development practices, including CI/CD pipelines.
Familiarity with Docker and containerised environments.
Experience working with issue tracking and project management tools such as Jira.
Your studies focused on Software Engineering.

Your skills

Solid understanding of software engineering principles and best practices.
Ability to design clean, maintainable, and testable code.
Strong analytical and problem-solving skills.
Experience with automated testing frameworks (unit, integration, end-to-end).
Ability to work independently and as part of a multidisciplinary team.
Clear communication skills, including the ability to explain technical concepts to non-technical users.
Structured and well-documented approach to development.
Spoken and written English or French, with a commitment to learn the other language.

Ideal start date: 05/01/2026

Contract duration (in months): 24

Job flexibility: Hybrid

Global Benefits at CERN

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.

Let's get you ready

Be sure to meet the eligibility criteria

You are a national of a CERN Member State or Associate Member State.
By the application deadline, you have a master’s degree with 2 to 6 years of professional experience since graduation or a PhD with a maximum of 3 years of professional experience since graduation. You are not eligible with only a bachelor’s degree.
You have never had a CERN fellow or graduate contract before.
Please pay attention to the additional criteria and requirements for this specific position and mentioned above.

You will need these documents to complete your application

Your CV (English or French)
A copy of your most relevant diploma or a certificate of achievement from your school (if you don't yet have your paper diploma)
Any document you consider relevant to your application

Your CERNDepartment

The EN department provides CERN with the engineering competences, infrastructure systems, and technical coordination required for the design, fabrication, installation, operation, maintenance, and dismantling of the accelerator complex and experimental facilities. Its mission is to deliver and sustain robust infrastructure systems, advanced engineering solutions, and technical coordination.

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!

Ready To apply?

Be prepared with our resources and tips

All good?

Apply now Allow 15 minutes to complete your online application

Still have a doubt ? Here are the most frequently asked questions

What should I expect during my first week at CERN?

Your onboarding at CERN includes a comprehensive induction programme, which starts with an official welcome session at the beginning of each month. In addition, you will receive important information both before and after your arrival to ensure a smooth transition into your new role. This process is designed to help you get acquainted with CERN’s environment, your team, and the tools and systems you’ll be using.
How big would the team be?

The size of the team you'll be working with at CERN depends on the specific role and department. Some teams are small and highly specialized, while others are larger and more interdisciplinary. During the interview process, you'll have the opportunity to learn more about the team structure for the position you are applying for.
What is the working language at CERN?

The working languages at CERN are English and French. However, it is not always mandatory to speak both languages to work at CERN. We offer language training to help you acquiring the other language.
What support does CERN provide for relocation?

CERN does not offer direct assistance with relocation. However, depending on your role and specific criteria, you may be eligible for certain benefits such as an installation allowance and coverage of travel expenses to join CERN. These benefits are designed to help ease the transition when relocating to the Geneva area. For more information, please consult the “Salary, Benefits and Support“ page.
Do I need a visa to work at CERN?

Whether you need a visa to work at CERN depends on your nationality and the duration of your stay. CERN assists with the necessary visa and work permit processes for its employees and visitors. The specific requirements will be communicated to you during the recruitment process.
What would my salary be?

Salaries at CERN are determined by a structured scale. Salaries are based on your role, qualifications, and experience, and are not subject to negotiation. Specific details will be provided as your application progresses. For more information, please refer to the dedicated page.