Full Stack Software Engineer

What you'll do

Are you an experienced Software Engineer passionate about full-stack web development and open-source technologies? Join a dynamic team at CERN, working on a large-scale open-source platform used daily by thousands of users worldwide.

You will contribute to the evolution of the CERN Document Server (CDS), CERN’s institutional repository, as it transitions to a modern platform based on InvenioRDM. CDS preserves and disseminates CERN’s scientific, administrative, and multimedia output, ensuring long-term access to the organisation’s intellectual and historical record.

In this role, you will work at the core of CERN’s digital repository ecosystem, helping to design, build, and operate a mission-critical service that supports Open Science at a global scale.

Your responsibilities

Designing and developing new modules and functionalities for the CERN Document Server (CDS), while contributing to its underlying open-source platform, InvenioRDM.
Collaborating with stakeholders to ensure CDS meets functional, usability, and service requirements.
Performing DevOps activities, including service configuration, deployment, monitoring, and maintenance.
Sharing expertise and collaborating with the wider InvenioRDM developer and open-source community.
Migrating content and services from the current CDS to the new InvenioRDM-based repository platform.
Providing user support and technical assistance to CDS users.
Managing and reviewing code contributions in line with open-source development best practices.

Still here? Let's make a quick check about

Your profile

Strong experience in full-stack web application development for large-scale systems, including back-end services, front-end user interfaces, and database schema design as well as experience in working with REST APIs.
Very advanced proficiency in Python, with solid knowledge of JavaScript and modern frameworks (e.g. React); documented experience with web frameworks like Flask or Django.
Proven experience with relational databases, particularly PostgreSQL, and ORM frameworks (e.g. SQLAlchemy), as well as hands-on experience with ElasticSearch/OpenSearch.
Hands-on experience with service deployment, configuration management, and operation in production environments, including container-based platforms such as Docker and OpenShift.
Demonstrated experience working with users, including requirements gathering, user support, and training.
Familiarity with modern web UI technologies and UX/usability best practices.
Experience contributing to open-source and/or distributed software projects, with the ability to collaborate effectively across teams.
Master's degree or equivalent relevant experience in the field of Software Engineering, Computer Science or a related field.

Your skills

Knowledge of programming techniques and languages.
Design of databases/repositories.
Knowledge of system configuration tools.
Capturing and analysis of requirements for ICT systems.
Has a structured and organised approach towards work; is able to set priorities and plan tasks with results in mind.
Identifies, defines and assesses problems, takes action to address them.
Builds and maintains constructive and effective work relationships.
Provides others with timely information.
Keeps up-to-date with developments in own field of expertise and readily absorbs new information.
Spoken and written English, with a commitment to learn French.

Ideal start date: 01/06/2026

Contract duration (in months): 36

Grade range: 6

Benchmark job: 200020 - Computing Engineer

Job flexibility: Hybrid

Employment conditions

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

Global Benefits at CERN

A minimum entry-salary of 9236 Swiss Francs per month (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.

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.
You have relevant qualifications and professional experience.
If you have previously held a Staff contract at CERN, you will not be eligible for these positions.
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)
Any document you consider relevant to your application

Your CERNDepartment

The IT Department designs, operates, and evolves CERN’s core computing and digital infrastructure. It provides the large-scale data processing, storage, networking, and collaboration services that enable CERN’s scientific programme. The Department supports the LHC and non-LHC experiments, accelerator systems, and the wider CERN community, while advancing new computing technologies through research, development, and strategic partnerships.

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.