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Backend Software Engineer - Database Systems (Oracle/Java) (BE-CSS-IDE-2026-82-LD) at CERN
CERNGeneva, GENEVA, ch·7h ago
Mid LevelFull-timeJavaAI
Salary Range
$89,760 - $121,440 /year
This salary is estimated based on similar roles. The actual salary may vary.
Introduction:
You will design and evolve complex data models at the heart of CERN's accelerator control 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. 
Functions:
• 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.
• Contribute to all phases of the software development lifecycle, from requirements analysis to deployment.
• Provide technical supervision and mentoring to junior software engineers.
• Provide day-to-day operational support to a large user community (500+ users).
• Propose and contribute to the evolution of systems under your responsibility and beyond
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About CERN
CERN, the European Organization for Nuclear Research, is a premier international research institution dedicated to fundamental physics. Established in 1954 near Geneva, Switzerland, CERN brings together scientists from around the world to explore the fundamental nature of the universe. The organization operates as a collaborative hub for cutting-edge research, focusing on particle physics and the development of advanced technologies to support scientific discovery. Its mission is to push the boundaries of human knowledge through large-scale, collaborative experiments. CERN’s primary activities include operating the Large Hadron Collider (LHC), the world’s largest and most powerful particle accelerator, and conducting experiments to investigate the fundamental constituents of matter and the forces that govern them. The organization also develops and shares innovative technologies, such as the Worldwide LHC Computing Grid, which processes and stores vast amounts of experimental data. CERN’s work primarily serves the global scientific community, including physicists, engineers, and researchers, who collaborate on groundbreaking projects aimed at advancing our understanding of the universe. Notable achievements include the discovery of the Higgs boson in 2012, a milestone in particle physics, and the development of the World Wide Web, originally created to facilitate information sharing among researchers. CERN holds a unique position as a leader in both scientific research and technological innovation, fostering international cooperation and driving progress in fundamental science. Its open-access approach to data and technology ensures that discoveries benefit the broader scientific community and society at large.
