# Lead Software Systems Engineer - GPU  Performance

**Company**: Nebius
**Location**: Remote - United States
**Work arrangement**: remote
**Experience**: senior
**Job type**: full-time
**Salary**: $170,000-$300,000 USD
**Category**: Engineering
**Industry**: Technology

**Apply**: https://job-boards.greenhouse.io/nebius/jobs/4841418101?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply
**Canonical**: https://yubhub.co/jobs/job_964611bc-3d1

## Description

We are looking for a Lead Software Systems Engineer - GPU Performance to play a key role in building our hyperscaler platform, working across its core components while analyzing and optimizing the performance of large-scale GPU clusters at the intersection of hardware and software.

You will operate across the full stack,from hardware and system software to networking (InfiniBand/RoCE), virtualization (KVM/QEMU), and distributed communication layers (e.g., MPI, NCCL).

In this role, you will:

- Focus on understanding system behavior across multiple layers, identifying performance bottlenecks, and driving improvements that shape how our clusters are built, operated, tuned, and validated.

- Investigate and troubleshoot performance issues of GPU cluster under real workloads (training and inference)

- Evaluate and integrate new hardware, system configurations, and tuning approaches through software stack

- Support complex performance-related escalations from internal teams and customers

- Work closely with infrastructure, software engineering, and hardware vendor teams (e.g., NVIDIA, Mellanox, Intel)

- Contribute to hardware and cluster qualification (acceptance), ensuring systems meet performance expectations

We expect you to have:

- 5+ years of professional experience in system-level software development (focused on performance optimization, 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).

Key employee benefits:

- Health insurance: 100% company-paid medical, dental, and vision coverage for employees and families.

- 401(k) plan: Up to 4% company match with immediate vesting.

- Parental leave: 20 weeks paid for primary caregivers, 12 weeks for secondary caregivers.

- Remote work reimbursement: Up to $85/month for mobile and internet.

- Disability & life insurance: Company-paid short-term, long-term, and life insurance coverage.

## Skills

### Required
- Linux
- performance optimization
- low-level programming
- C/C++
- Go
- Python
- server architecture
- PCIe devices
- NICs
- Linux OS/Kernel
- high-performance computing (HPC) systems

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Source: [Apply at job-boards.greenhouse.io](https://job-boards.greenhouse.io/nebius/jobs/4841418101?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)