Backend Software Engineer - Database Systems (Oracle/Java) - Fr.9'236 A Month in Genève

Backend Software Engineer - Database Systems (Oracle/Java)CERNWorkplaceGeneva - Lake Geneva region - SwitzerlandCategoryComputer Science | InnovationPositionEngineer / TechnicianPublished2 April 2026Closing Date5 March 2026Geneva, Switzerland BE-CSS-IDE-2026-82-LD Ideal start date: 01/09/2026Before 03/05/2026 at 23:59 (Geneva Time)What you’ll doYou will design and evolve complex data models at the heart of CERN’s acceleratorcontrol systems, working on the database backend of large-scale, mission-critical applications. Your work will focus on Oracle-based schemas and Java backend services exposing APIs to applications, tightly integrated into full-stack software systems.Robust and scalable database systems are essential for control, configuration, and operational applications enabling the operation of CERN’s accelerator complex. You will contribute to the evolution of these data-intensive systems, working on long-lived data models and performance- critical access patterns.You will join a multidisciplinary team and play a key role in building reliable backend solutions aligned with users’ needs, contributing to systems used at the world’s largest particle physics laboratory.Learn moreYour responsibilities- Interact with stakeholders, including end-users, Product Owners, and infrastructure providers to gather requirements.- Design and implement reliable data models ensuring ACID properties.- Develop and maintain APIs to access and manipulate data using CRUD operations, including interfacing with AI systems.- Analyse integration requirements across multiple technical domains and design and implement robust solutions.Still here? Let’s make a quick check aboutYour profile- Experience developing high-performance relational databases with Oracle and/or PostgreSQL RDBMS.- Experience in the design and evolution of data models in technical domains.- Knowledge of designing and maintaining high-availability, client-oriented APIs, ideally REST- and gRPC-based.- Experience in Java software development using Spring Boot, JPA, and Hibernate.Your skills- Knowledge of programming techniques and languages.- Design of databases/repositories.- Architecture and design of ICT systems.- Identification and selection of relevant emerging ICT technologies.Ideal start date: 01/09/2026Contract duration (in months): 60Grade range: 6Benchmark job: 200020 - Computing EngineerJob flexibility: HybridGlobal 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 readyBe 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 applicationYour CERN DepartmentThe BE department is at the heart of CERN’s accelerator complex.Its mission is to lead the development, construction, and operation of advanced particle accelerators, and to provide cutting-edge technology solutions that enable new discoveries in fundamental physics. Committed to promoting a culture of excellence, creativity and collaboration, individuals from diverse backgrounds contribute to the advancement of science and technology, as well as engaging in scientific education, outreach, and broader knowledge and technology transfer initiatives.Of CERNDiscover 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!Ready To apply?Be prepared with our resources and tips- Our Hiring Process- Life at CERN- Tips for your Application- Working at CERN- What happens after you apply?- More about CERNAll good?Allow 15 minutes to complete your online applicationStill 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.More informationIn your application, please refer to myScience.Ch and referenceJobID69598.