Crusoe · 1 day ago
Senior Systems Software Engineer
San Francisco, CA
Full-time
Onsite
Senior Level, Lead/Staff
$172K/yr - $209K/yrCrusoe is on a mission to accelerate the abundance of energy and intelligence, focusing on sustainable technology for AI applications. The Senior Systems Software Engineer will play a critical role in designing and developing compute applications for virtualized AI platforms, ensuring seamless integration and optimization of the virtualization stack.
AI InfrastructureArtificial Intelligence (AI)Data CenterEnergyEnergy ManagementOil and Gas
Responsibilities
Design highly reliable and performant Linux applications used to manage our virtualization stack across thousands of AI compute servers in multiple global datacenters
Integrate Crusoe applications with a wide variety of hardware and software AI chip-vendor stacks
Build solutions to optimize and monitor virtualized hardware (GPUs, Infiniband/ROCe NICs, Ephemeral Storage, etc.) in cutting-edge AI/HPC environments
Work side by side with our Linux Kernel and Hypervisor teams to ensure our Crusoe applications are seamlessly integrated with a variety of kernels and hypervisors
Analyze and enhance the performance of the entire virtualization stack, from the hypervisor to the virtualized guest OS, with a specific focus on optimizing AI/ML workloads
Diagnose and resolve complex system issues across our virtualization stack (drivers, kernel, hypervisor, guest OS, and crusoe applications)
Conduct thorough code reviews to ensure the highest level of software quality, reliability, and security within compute applications and virtualization stack
Collaborate with other engineering teams, including hardware design, OS development, and AI/ML application teams, to ensure cohesive and integrated product development
Provide technical guidance and mentorship to junior engineers, fostering a culture of technical excellence and collaborative problem-solving within the compute applications team
Qualification
Required
Experience building applications on Linux kernels, specifically pertaining to virtualization, device drivers, memory management, and process scheduling
Solid understanding of hardware devices such as GPUs, CPUs, Infiniband and Ethernet NICs, Ephemeral Disks, and PCI Express
Strong grasp of distributed applications and highly-scalable systems design. Specific focus around communications protocols (GRPC, REST, TCP/IP, etc.), databases (Postgres, Redis), and systems design applications (Pub/Sub, Kafka)
Strong experience building software applications, both at the higher (Golang, Java, Python) and lower (C, C++, Rust) levels. Keen eye for clean, maintainable code, and a unit-test driven mindset
Ability to collaborate with teams across an organization, blocking out noise, and focusing on what needs to get done to get a project across the line
Capable of adapting quickly, eager to research new technology and not get overwhelmed by unfamiliar tech stacks
General knowledge of hypervisors, virtual machine lifecycles, and Linux KVM tooling
Understanding of how to build Gitlab or Github CI/CD pipelines that deliver bug-free code across a multitude of compute platforms
Preferred
Experience with virtualization specifically for AI/ML workloads, including GPU virtualization
Previous work debugging or contributing to kernel or hypervisor code, particularly around device management
Experience with configuring thousands of live compute nodes in a bare-metal production environment
Benefits
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 $300 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