Full-Stack Software Engineer; IT-CA-IR--GRAE

Responsibilities

• Develop and maintain web applications using Python on the backend and React on the frontend and implement new features to support the archiving, publication, and sharing of research outputs.
• Contribute to the migration of existing content to a new digital platform, ensuring data quality and consistency.
• Write, test, and review code to ensure reliability, performance, and maintainability.
• Collaborate with software engineers and end users to understand requirements and translate them into technical solutions.
• Document technical solutions and contribute to user and developer documentation.
• Learn and apply best practices in software engineering, version control, and agile teamwork.

• Experience with Python and web application development (for example using Flask or similar frameworks).
• Basic knowledge of JavaScript and modern web interfaces (for example React or similar libraries).
• Familiarity with version control systems, such as Git.
• Ability to write clear, maintainable code and learn new technologies.
• Experience with relational databases, such as PostgreSQL.
• Familiarity with search or indexing technologies, such as Elasticsearch or Open Search.
• Exposure to container technologies, such as Docker, and container platforms (for example Open Shift).
• Experience contributing to or working with open-source software projects.

• Python, Flask, JavaScript, React, Git skills are required.
• PostgreSQL, Elasticsearch/Open Search skills are advantageous.
• Docker, Open Shift skills are advantageous.
• Experience working on open source projects is advantageous.
• Spoken and written English, with a commitment to learn French.

• You are a national of a CERN Member or Associate Member State.
• By the Final date to receive applications, you have a maximum of two years of professional experience since graduation in Software Engineering (or a related field) and your highest educational qualification is either a Bachelor's or Master's degree.
• You have never had a CERN fellow or graduate contract before.
• Applicants without University degree are not eligible.
• Applicants with a PhD are not eligible.

Job closing date: 14.07.2026 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-November-2026.

Job reference: IT-CA-IR-2026-99-GRAE.

Field of work:
Software Engineering and IT.

• A monthly stipend between  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.