Crusoe · 5 months ago
Staff/Senior Staff Software Engineer - Cloud Hypervisor R&D
San Francisco, CA - US
Full-time
Onsite
Senior Level, Lead/Staff
$204K/yr - $247K/yrCrusoe is building the World’s Favorite AI-first Cloud infrastructure company, pioneering AI infrastructure solutions for Fortune 500 companies. The Senior Staff Software Engineer will be responsible for the design, development, and optimization of virtualization technologies tailored for AI workloads, focusing on hypervisor components and performance enhancement.
AI InfrastructureArtificial Intelligence (AI)Data CenterEnergyEnergy ManagementOil and Gas
Responsibilities
Hypervisor Development & Optimization: Design, develop, and optimize core hypervisor components (e.g., KVM, QEMU, or custom solutions) to achieve maximum performance and efficiency for AI workloads. This includes focusing on CPU, memory, and I/O virtualization techniques
Virtualization Research & Innovation: Conduct in-depth research into advanced virtualization technologies, exploring novel approaches for isolating and accelerating AI compute, storage, and networking resources. Identify and prototype new virtualization features and enhancements to improve density, throughput, and latency
Virtual Hardware & Device Emulation: Develop and enhance virtual hardware components and device emulation, ensuring optimal performance and compatibility for specialized AI accelerators (e.g., GPUs, DPUs) within the virtualized environment
Performance Analysis & Tuning: Analyze and enhance the performance of the entire virtualization stack, from the hypervisor to the virtualized guest OS, with a specific focus on optimizing for AI/ML workloads. This includes profiling, bottleneck identification, and implementing low-level optimizations
System-Level Troubleshooting: Diagnose and resolve complex system issues within the virtualization layer. Work closely with hardware and guest OS teams to debug and resolve integration challenges
Code Review and Quality Assurance: Conduct thorough code reviews to ensure the highest level of software quality, reliability, and security within the hypervisor and virtualization components
Cross-Functional Collaboration: Collaborate with other engineering teams, including hardware design, OS development, and AI/ML application teams, to ensure cohesive and integrated product development
Technical Leadership: Provide technical guidance and mentorship to junior engineers, fostering a culture of technical excellence and collaborative problem-solving within the virtualization team
Qualification
Required
Proven deep knowledge of hypervisor internals (e.g., KVM, QEMU, Xen, or other bare-metal hypervisors), including CPU virtualization (VT-x/AMD-V), memory virtualization (EPT/NPT, MMU), and I/O virtualization (SR-IOV, virtio)
Strong understanding of virtual machine lifecycle, live migration, snapshotting, and fault tolerance mechanisms
Experience with Linux kernel internals as they pertain to virtualization, including device drivers, memory management, and scheduling within a virtualized context
Familiarity with hardware architectures relevant to virtualization, including CPUs (x86, ARM), GPUs, and Smart NICs/DPUs. Experience with hardware offloads and acceleration for virtualization
Demonstrated ability to identify and resolve performance bottlenecks in complex virtualized systems. Experience with profiling tools and techniques
Strong debugging skills in complex, distributed systems at the hypervisor and kernel levels
Preferred
Experience with virtualization specifically for AI/ML workloads, including GPU virtualization or direct pass-through
Familiarity with container runtimes and their interaction with hypervisors
Contributions to open-source virtualization projects
Experience with security hardening of hypervisors and virtual machines
Benefits
Industry competitive pay
Restricted Stock Units in a fast growing, well-funded technology company
Health insurance package options that include HDHP and PPO, vision, and dental for you and your dependents
Employer contributions to HSA accounts
Paid Parental Leave
Paid life insurance, short-term and long-term disability
Teladoc
401(k) with a 100% match up to 4% of salary
Generous paid time off and holiday schedule
Cell phone reimbursement
Tuition reimbursement
Subscription to the Calm app
MetLife Legal
Company paid Commuter FSA benefit of $200 per month
Company
Crusoe
Crusoe is a vertically integrated AI infrastructure company that builds and operates data centers powered by energy sources.
Founded in 2018
1001-5000 employees
H1B Sponsorship
Crusoe has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (69)
2024 (14)
2023 (2)
2022 (1)
2021 (1)
Funding
Current Stage
Late StageTotal Funding
$3.9BKey Investors
Victory Park CapitalBrookfield Asset ManagementUpper90
2025-12-19Secondary Market
2025-10-23Series E· $1.4B
2025-08-25Debt Financing· $175M
Leadership Team
Chase Lochmiller
Co-Founder and Chief Executive Officer
Cully Cavness
Co-Founder, President and Chief Strategy Officer
Recent News
2026-01-08
Crunchbase News
2026-01-06
globalventuring.com
2025-12-31
Company data provided by crunchbase