Staff Cloud Hypervisor Engineer, Compute
Crusoe is an active AI-infrastructure company operating an AI cloud platform, managed AI services, and AI data-center infrastructure.
Projects
About Crusoe, Inc.
Crusoe designs, builds, and operates energy-first AI infrastructure. Its offerings include Crusoe Cloud for GPU-based training, fine-tuning, inference, and managed services, alongside AI-optimized data centers and energy infrastructure.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You will lead the architecture of a greenfield virtualization stack where GPUs, DPUs and high-speed interconnects are first-class citizens. You will build hypervisor components, develop hardware pass-through techniques, solve challenges like live migration for large-VRAM AI workloads, profile bottlenecks across the stack, contribute to open source projects, and design strong tenant isolation.
Requirements
- 7+ years of experience in hypervisor internals, kernel development, or low-level systems programming
- Expert knowledge of CPU virtualization (Intel VT-x, AMD-V) and memory virtualization (EPT/NPT, HugePages)
- Experience with GPUs, InfiniBand/RoCE NICs, and SmartNICs/DPUs
- Mastery of C and C++; Rust highly preferred
- Experience with QEMU, KVM, and Linux kernel debugging tools (perf, ftrace, eBPF)
- Deep understanding of VirtIO, vhost-user, and hardware-accelerated I/O paths
- Experience leading complex cross-functional projects
Responsibilities
- Lead R&D and implementation of core hypervisor components (KVM, QEMU, or custom Rust-based solutions) optimized for large GPU fleets
- Develop hardware pass-through and abstraction techniques (SR-IOV, VFIO, mdev) for NVIDIA GPUs and BlueField DPUs
- Solve live migration for AI workloads with 80GB+ VRAM and optimize PCIe peer-to-peer communication
- Conduct bottleneck analysis across CPU microarchitecture, MMU virtualization and guest OS scheduling
- Contribute to and maintain upstream open-source virtualization projects
- Architect security boundaries and multi-tenant isolation for AI cloud infrastructure
Benefits
- Competitive compensation and equity packages
- Restricted Stock Units
- Paid time off, paid holidays & leave of absence programs
- Comprehensive health, dental & vision insurance
- Employer contributions to HSA account
- Paid parental leave
- Paid life insurance, short-term and long-term disability
- Professional development & tuition reimbursement
- Mental health & wellness support
- Commuter benefits (parking & transit)
- Cell phone stipend
- 401(k) with company match up to 4% of salary
- Volunteer time off
- Global travel insurance & emergency assistance
- Daily meals allowance
- Additional perks & programs specific to location