Junior Full-Stack Software Engineer

What you'll do

Are you a motivated Software Engineer with a passion for delivering complex and compelling information systems end-to-end? Are you at ease with server-side technologies, and also with writing frontends in JavaScript and not afraid to optimise database queries, to dive into data integration processes or configure and debug messaging/eventing systems? Do you enjoy working in an agile environment and a self-organised team?

Then join our team of talented engineers and contribute to application software for CERN’s Corporate Information Systems. CERN, take part!

You will join the Business Computing (BC) group in the Finance and Administrative Processes (FAP) department, where 80+ talented international colleagues are responsible for delivering information systems for all of CERN’s business functions.

The product management-driven Business Computing Group is working for clients across the whole organisation (HR, Finance, Planning, Safety, Security, Purchasing, Logistics, and Accelerator Operations).

The type of products under the group’s responsibility range from custom-made solutions for a few users to large and widely integrated systems with 15,000+ users. Hence, working for the BC group provides numerous perspectives for being in touch with different technologies and business areas.

As a Full-Stack Software Engineer in the Business Computing group, you will be part of a self-organised agile team responsible for the design, implementation, configuration and support of software solutions used across all of CERN.

Learn more

Your responsibilities

Design and develop full-stack enterprise applications.
Implement and test software solutions.
Develop frontend and backend features.
Optimise SQL queries and database integrations.
Configure and debug integration/messaging systems.
Provide user and production support.
Work in an agile self-organised team.
Contribute to continuous process improvement.
Participate in knowledge sharing activities.
Maintain and enhance legacy applications.
Use CI/CD and containerised development workflows.
Collaborate with Product Managers and stakeholders.

Still here? Let's make a quick check about

Your profile

Experience developing full-stack enterprise applications using Java, Spring Boot, and JavaScript. frontend frameworks (e.g. React).
Experience with build, test, and deployment toolchains.
Experience working with SQL and relational databases and Java database integration.
Experience working in agile development teams.
Experience with modern development workflows including Git, CI/CD (e.g. GitLab), containerisation, and GitOps.
Experience maintaining and implementing features in legacy applications.
If you are excited about this role but your past experience does not align perfectly with every qualification in the job description, we encourage you to apply anyway. You may just be the right candidate for this or other roles.
Your studies focused on Computer Science / Computer Engineering.

Your skills

Full-stack development with Java, Spring Boot, JavaScript, React, and similar frameworks.
Understanding of modern software design and architecture principles and patterns, and their. application in the Java and JavaScript ecosystems.
Knowledge of Git or equivalent VCS.
Knowledge of CI/CD tools like GitLab or equivalent.
Knowledge of containerised software solutions.
Knowledge of GitOps software development workflows.
Knowledge of Power BI or a similar reporting solution.
Knowledge of PL/SQL.
Knowledge of cloud migrations of on-premise software.
Spoken and written English, with a commitment to learn French.

Ideal start date: 01/11/2026

Contract duration (in months): 24

Job flexibility: Hybrid

Team supervision

Employment conditions

Work during nights, Sundays and official holidays, when required by the needs of the Organization.

Global Benefits at CERN

A monthly net stipend between 5266-5793 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.

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. Currently, we cannot consider applications from Pakistani and Lithuanian nationals for positions with a 2026 start date, as the ceiling defined under Article II.5 of the Associate Membership Agreement has been reached.
By the application deadline, you have a maximum of 2 years of professional experience since graduation in the respective field and your highest educational qualification is either a bachelor’s or master’s degree. You must have a university degree and can’t hold a PhD.
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

FAP delivers reliable financial services and business computing solutions that are agile, compliant, and future-ready — through the automation of financial operations, improved financial planning capabilities, and a simplified, unified business software environment that supports CERN’s strategic ambitions.

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!

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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.