Principal Systems Software Engineer

Responsibilities

• Architect systems for Bare-Metal-as-a-Service (BMaaS) delivering raw GPU throughput via InfiniBand/RDMA fabrics
• Design optimized virtualization layers using KVM or custom micro-VMs
• Build high-performance container substrates utilizing Kubernetes or Slurm
• Lead architectural design of internal cloud fabric including SR-IOV and virtualized GPU scheduling
• Lead R&D workstreams to prototype novel memory, networking, and compute management methods
• Draft technical white papers and RFCs defining the compute and networking stack
• Resolve complex race conditions in the I/O path and optimize kernel-level memory pinning
• Represent the company in open-source communities and industry forums

Requirements

• 12+ years of experience designing core infrastructure at a major hyperscaler or HPC cloud
• Authoritative knowledge of Linux kernel and virtualization internals (KVM, QEMU, Firecracker)
• Expertise in high-performance networking (RoCE v2, InfiniBand)
• Proven ability in hardware-software co-design for NVIDIA/AMD GPUs and high-speed NICs
• Experience leading cross-functional R&D teams through high-ambiguity projects
• Bachelor's or Master's degree in Computer Science, Computer Engineering, or a related field

Preferred Qualifications

• Patents related to network virtualization, GPU scheduling, or distributed file systems
• Maintainer status or significant contributions to Linux Kernel, Kubernetes, or HPC projects
• Experience optimizing infrastructure for LLM training and inference at scale
• Peer-reviewed publications at top systems venues (OSDI, SOSP, NSDI, SC)

Benefits

• Competitive compensation and Restricted Stock Units
• Comprehensive health, dental, and vision insurance
• 401(k) retirement plan with up to 4% company match
• Paid parental leave and volunteer time off
• Professional development and tuition reimbursement
• Mental health and wellness support
• Commuter benefits and cell phone stipend

About the Company

Crusoe is a vertically integrated AI infrastructure company that owns and operates every layer of the stack to power ambitious AI workloads through an energy-first approach.