Ceph Software Engineer (IT-SD-GSS-2026-96-LD) at CERN

Introduction Work with us to evolve the CERN data storage systems used at the Large Hadron Collider (LHC) and at its international partners. CERN is the birthplace of the World Wide Web and one of the world’s leading laboratories for particle physics. Join the Storage and Data Management Group in CERN’s IT Department as a Software Engineer for a unique challenge as the next step in your career. CERN, take part! The CERN IT Storage and Data Management group operates the core services used by both LHC and non-LHC experiments for data collection, archival, reconstruction, analysis, and global distribution via the Worldwide LHC Computing Grid. As a Ceph Software Engineer, you will contribute to the design, evolution, and operation of large-scale distributed critical storage services for the CERN cloud and computing infrastructures. You will work hands-on with Ceph-based block, object, and filesystem solutions (including CephFS and NFS integrations), ensuring high availability, performance, and resilience across multi-datacenter environments. Your role will involve troubleshooting complex system-wide issues, optimising storage architectures for demanding workloads such as HPC and AI/ML, and continuously improving automation, deployment, and observability, aligned with modern DevOps practices. Leveraging strong Linux expertise and systems programming skills (e.g., C/C++, Go, or Rust) you will help evolve the distributed storage technology, while maintaining robust, scalable and secure systems.  Functions • Co-lead management and operations of distributed disk storage, block, object and filesystem services based on mainstream open-source technologies (Ceph, NFS). • Participate in the evolution of architecture and design of storage services for CERN cloud and compute infrastructure, as well as core business applications (physics data processing, ML/AI, HPC use-cases). • Integrate, troubleshoot and maintain distributed disk storage systems at scale, across multiple availability zones and data centres. • Contribute to documentation, development, optimisation and further automation of storage services. • Contribute to change management, incident response, and user support. • Liaise with key stakeholders inside and outside of the IT department.