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Senior Systems Software Engineer

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Crusoe

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Location:
United States , San Francisco

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

172000.00 - 209000.00 USD / Year
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Job Description:

The Crusoe Cloud Software Development team is seeking a passionate and experienced Senior/Staff Software Engineer specializing in Systems Applications. This pivotal role is critical in the design and development of our compute platform, specifically focusing on building compute applications for virtualized AI-platforms. An understanding of the linux kernel, virtualization, hardware tuning, distributed systems, object oriented programming, and low-level systems programming are critical to this role. Excellent communication skills and a desire to work with a wide range of technologies across the linux stack are both a must. This is a full-time position.

Job Responsibility:

  • 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. This includes profiling, bottleneck identification, and implementing low-level optimizations
  • Diagnose and resolve complex system issues across our virtualization stack (drivers, kernel, hypervisor, guest OS, and crusoe applications). Work closely with kernel and hypervisor teams to debug and resolve integration challenges
  • 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

Requirements:

  • 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

Nice to have:

  • 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
What we offer:
  • 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

Additional Information:

Job Posted:
February 21, 2026

Employment Type:
Fulltime
Work Type:
On-site work
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