Description
We are looking for a Senior Site Reliability Engineer (SRE) to join the Compute Node team at Nebius AI Cloud. The Compute Node team is responsible for building and operating the cluster scheduler and node-level services that run and manage virtual machines across all cloud regions.
Responsibilities:
- Ensure reliability, availability, and performance of compute nodes running VMs
- Analyze and debug Linux systems across user space and kernel space, understanding capabilities, limitations, and trade-offs at each layer
- Troubleshoot complex production issues involving CPU, memory, NUMA, cgroups, and scheduling
- Work hands-on with virtualization and containerization, primarily using QEMU/KVM and Linux-native technologies
- Design and evolve observability as a core capability of the node layer: metrics, logs, traces, alerts, SLIs, and SLOs
- Lead incident response, root-cause analysis, and postmortems, driving long-term reliability improvements
- Collaborate closely with platform, kernel/hypervisor, GPU, and infrastructure teams to improve system design and operability
Requirements:
- Strong Linux expertise: deep understanding of Linux user space and kernel space, knowledge of kernel subsystems, and clear understanding of system boundaries and constraints
- Virtualization experience: hands-on experience with QEMU/KVM and understanding of VM lifecycle, performance characteristics, and failure modes
- Containerization knowledge: practical experience with containers, namespaces, and cgroups, and strong understanding of resource isolation and control
- Strong debugging skills: ability to reason about complex system failures and structured, hypothesis-driven approach to incident analysis
- SRE mindset: clear understanding of the SRE role in system design and operations, experience building and operating observability stacks, and ability to turn system behavior into actionable reliability signals
Nice to Have / Optional:
- Experience with Kubernetes internals or node-level components
- Hands-on experience with low-level Linux debugging tools
- Familiarity with large-scale compute or bare-metal platforms
- Contributions to open-source infrastructure or system software
- Experience debugging hardware and driver-level issues
Benefits & Perks:
- Competitive compensation
- Career growth and learning opportunities
- Flexibility and ownership
- Collaborative and innovative culture
- Opportunity to work on impactful AI projects
- International environment and talented teams