Lead Software Systems Engineer - GPU Performance
$170k - $300k • Remote • Remote - United States
Posted 5d ago
About the job
Nebius is building a full-stack AI cloud platform to support developers and enterprises from data and model training through to production deployment. We are looking for a Lead Software Systems Engineer - GPU Performance to play a key role in building our hyperscaler platform. This role involves analyzing and optimizing the performance of large-scale GPU clusters at the intersection of hardware and software, operating across the full stack from hardware and system software to networking, virtualization, and distributed communication layers.
Responsibilities
- Understand system behavior across multiple layers, identify performance bottlenecks, and drive improvements in cluster building, operation, tuning, and validation.
- Investigate and troubleshoot performance issues of GPU clusters under real workloads (training and inference).
- Evaluate and integrate new hardware, system configurations, and tuning approaches through the software stack.
- Support complex performance-related escalations from internal teams and customers.
- Collaborate with infrastructure, software engineering, and hardware vendor teams (e.g., NVIDIA, Mellanox, Intel).
- Contribute to hardware and cluster qualification (acceptance) to ensure systems meet performance expectations.
Requirements
- 5+ years of professional experience in system-level software development, focused on performance optimization and low-level programming.
- 3+ years of hands-on experience with Linux systems (administration, troubleshooting, and performance tuning).
- In-depth understanding of server architecture, including PCIe devices, NICs, Linux OS/Kernel, and high-performance computing (HPC) systems.
- Strong proficiency in one or more performance-oriented programming languages (C/C++, Go, Python).
Benefits
- 100% company-paid medical, dental and vision coverage for employees and families.
- Up to 4% company match with immediate vesting for 401(k) plan.
- 20 weeks paid parental leave for primary caregivers, 12 weeks for secondary caregivers.
- Up to $85/month reimbursement for mobile and internet for remote work.
- Company-paid short-term, long-term and life insurance coverage.
- Competitive compensation.
- Career growth and learning opportunities.
- Flexibility and ownership.
- Collaborative and innovative culture.
- Opportunity to work on impactful AI projects.
- International environment and talented teams.