Staff Cloud Hypervisor Engineer, Compute
Crusoe · Sunnyvale, CA - US
About this role
## Staff Cloud Hypervisor R&D Engineer (Compute) Crusoe is building the “engine room” of the AI revolution—accelerating the abundance of energy and intelligence. As a vertically integrated AI infrastructure company, we own and operate each layer of the stack (from electrons to tokens) to power the world’s most ambitious AI workloads. In this role, you’ll lead the R&D and architecture for a next-generation virtualization stack—designing a **greenfield hypervisor environment** where **GPUs, DPUs, and high-speed interconnects** are first-class citizens. Your goal: eliminate the “virtualization tax” and deliver **bare-metal performance** for demanding AI/ML workloads. --- ## What you’ll be working on - **Next-Gen Hypervisor Architecture:** Lead R&D and implementation of core hypervisor components (e.g., **KVM, QEMU**, or custom **Rust-based** solutions) optimized for massive-scale GPU fleets. - **AI Hardware Virtualization:** Develop advanced hardware pass-through and abstraction techniques (**SR-IOV, VFIO, mdev**) to enable near-zero latency for **NVIDIA GPUs** and **BlueField DPUs** in multi-tenant environments. - **“Holy Grail” Challenges:** Tackle live migration for AI workloads with **80GB+ VRAM**, and optimize **PCIe peer-to-peer** communication between virtualized accelerators. - **Performance Research & Profiling:** Deep-dive bottleneck analysis across the stack—from CPU microarchitecture and MMU virtualization to guest OS scheduling—to minimize jitter and maximize throughput. - **Open Source Leadership:** Contribute to and maintain upstream open-source virtualization projects, helping position Crusoe as a thought leader in Linux kernel and virtualization communities. - **Security & Isolation:** Architect robust security boundaries for AI-native cloud infrastructure, balancing high-performance hardware access with strict multi-tenant isolation and hardening. --- ## What you’ll bring - **7+ years of experience** in hypervisor internals, kernel development, or low-level systems programming. - **Deep virtualization expertise**, including CPU virtualization (**Intel VT-x, AMD-V**) and memory virtualization (**EPT/NPT, HugePages**), with comfort discussing **VMExit overhead**. - **Hardware-software integration** experience with GPUs, **InfiniBand/RoCE NICs**, and **SmartNICs/DPUs**. - **Programming & tooling:** Strong **C/C++** required; **Rust** preferred. Experience with **QEMU, KVM**, and Linux kernel debugging tools (**perf, ftrace, eBPF**). - **I/O mastery:** Deep understanding of **VirtIO**, **vhost-user**, and hardware-accelerated I/O paths. - **Technical leadership:** Experience leading complex, cross-functional projects bridging hardware engineering and cloud control planes. --- ## Benefits - Competitive compensation and equity packages (including **RSUs**) - Paid time off, paid holidays & leave of absence programs - Comprehensive health, dental & vision insurance - Employer contributions to HSA - Paid parental leave - Paid life insurance, short-term & 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% - Volunteer time off - Global travel insurance & emergency assistance - Daily meals allowance - Additional location-specific perks --- ## Compensation Up to **$215,000–$260,000 + Bonus** (RSUs included in all offers). Final compensation depends on knowledge, education,
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