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Job Description Are you passionate about software development? Are you interested in supporting open science and reproducible computational research across Europe? Join our team working on the open-source REANA platform for reproducible computational data analyses! You will specifically take part in the nascent European Open Science Cloud (EOSC) Federation and the EOSC Mesh project which is designing federated digital infrastructures to cross-link research environments across Europe. Your Responsibilities As a full-stack developer in our team, you will: Collaborate with European Open Science Cloud project partners on developing cross-node federated analysis workflow infrastructure and support corresponding scientific use cases. Participate in the evolution the CERN Node of the EOSC Federation, allowing researchers to analyse more than 5 petabytes of open data from experimental particle physics. Contribute to the service deployment, operations and monitoring on the Kubernetes cloud. Work closely with researchers to provide support for cross-node computational data analysis examples. Participate in the operation and development of the REANA reproducible data analysis platform. More information here. Your profile Experience in full-stack software development and with frontend and backend software engineering technologies. Experience with container technologies and application deployment, monitoring and security. Some familiarity with basic principles of computational research data analyses would be a plus. Some prior experience working in European Commission co-funded projects would be a plus. Skills Strong problem-solving and communication skills, with an interest in collaborative open-source development. Frontend development technologies: React. Backend development technologies: Python, Go. Application deployment: Docker, Kubernetes, Helm. Spoken and written English, with a commitment to learn French. 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 Computer Science or equivalent (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. Additional Information Job closing date: 09.09.2026 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 This position involves: Stand-by duty, when required by the needs of the Organization. Work during nights, Sundays and official holidays, when required by the needs of the Organization. Job reference: IT-CA-OSI-2026-207-GRAE Field of work: Information Technologies Benchmark job: 200020 - Computing Engineer Global Benefits A monthly net stipend of either 5266 or 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. 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! More information about us, here: careers.cern
Here's where they are and how to stand out in your next interview.
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Most developer ads you'll see are written in English: 18,397 of the 24,795. That doesn't tell you whether the job itself requires you to speak English or work in English daily, so read each posting carefully. Don't assume the language of the ad matches the language of the team.
The employers posting the most developer roles are Link Group (369 jobs), Upvanta (257), jobgether (226), and OfferZen (212). If you're applying to any of these, research their hiring patterns. They move fast and post often, which means they're either scaling hard or replacing people who didn't fit.
In your interview, expect this: 'Walk me through the last time you had to debug something that took you more than an hour. What was it, what did you try first, and what would you do differently?' Hiring managers ask this to see if you think systematically or just try random fixes. Have a real example ready with specifics.