Software Engineer for Geodetic Metrology Applications (BE-GM-APC-2025-252-GRAE)

You will contribute to the maintenance and evolution of the existing software infrastructure, with a focus on enhancing C++, Qt, and Python modules that are essential to the daily operations of CERN's Surveying teams.

Your responsibilities

• Investigate and resolve software issues reported by users, provide timely feedback, and coordinate development activities with the supervisor in accordance with current priorities;
• Refactor and update legacy systems to address the challenges of new projects, improving scalability, performance, and robustness while ensuring compatibility with existing workflows;
• Develop and deploy Python-based calculation and data visualisation scripts on the existing user platform;
• Design, develop, and optimise libraries and APIs for seamless integration across different computing platforms within CERN's IT and control systems infrastructure;
• Contribute to the consolidation of the AGILE-based development workflow through the use of industry-standard tools such as Jira and Git;
• Strengthen the continuous integration and deployment (CI/CD) pipelines implemented in GitLab.

More information here.

Your profile

• Experience in C++, Python - and possibly Qt- for developing and maintaining complex software modules.
• Ability to refactor and modernize legacy code, with attention to performance, scalability, and maintainability.
• Interested in debugging and troubleshooting software issues in live environments.
• Proactive in providing user support, gathering feedback, and addressing issues in a timely and structured manner.
• Comfortable working in an AGILE-based development process, using tools like Jira for task tracking and Git for version control.

Skills:

Programming Languages:

• Experience with C++ and Python.
• Basic proficiency in HTML and JavaScript for web-related tasks or integrations.

Libraries & Frameworks:

• Familiarity with the Qt framework (highly beneficial, especially for GUI development) is a plus.
• Familiarity with common Python data science and visualisation libraries.

Development Practices:

• Solid understanding of version control systems, especially Git, and experience with CI/CD workflows.
• Ability to write effective unit tests and ensure code quality through testing.

Work Approach:

• Demonstrating autonomy, initiative, and a rigorous approach to problem-solving.
• Capable of managing tasks independently while maintaining high standards.
• Good communication skills, both within a development team and when interacting with end users or stakeholders.
• Collaborative mindset with the ability to adapt in team-based environments.

Language skills:

• Spoken and written English or French, with a commitment to learn the other language.

Eligibility criteria:

• You are a national of a CERN Member or Associate Member State.
• By the application deadline, you have a maximum of two years of professional experience since graduation in Master in Information Technology (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: 04.01.2026 at 23:59 CET.

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-March-2026

Job reference: BE-GM-APC-2025-252-GRAE

Field of work: Software Engineering and IT

Benchmark job: 200020 - Computing Engineer

What we offer

• A monthly stipend ranging between 5196 and 5716 Swiss Francs (net of tax).
• Coverage by CERN's comprehensive health scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund.
• Depending on your individual circumstances: installation grant; family, child and infant allowances; payment of travel expenses at the beginning and end of contract.
• 30 days of paid leave per year.
• On-the-job and formal training at CERN as well as in-house language courses for English and/or French.

About us

At CERN, the European Organization for Nuclear Research, physicists and engineers are probing the fundamental structure of the universe. Using the world's largest and most complex scientific instruments, they study the basic constituents of matter - fundamental particles that are made to collide together at close to the speed of light. The process gives physicists clues about how particles interact, and provides insights into the fundamental laws of nature. Find out more on http://home.cern.

Diversity has been an integral part of CERN's mission since its foundation and is an established value of the Organization. Employing a diverse workforce is central to our success.