search Browse Jobs
Lead Software Systems Engineer - GPU PerformanceNebius · Remote - United States
Nebius logo

Nebius

company page ↗

Lead Software Systems Engineer - GPU Performance

🗓️ Posted 2026-09-01 Remote - United States Hybrid ICT
💰 Salary Not shared 📊 Market NA

About the Company

Nebius is leading a new era in cloud infrastructure for the global AI economy. The company builds a full stack AI cloud platform that supports developers and enterprises from data and model training through to production deployment, eliminating the cost and complexity of large in house AI/ML infrastructure. Built by engineers for engineers, Nebius handles large scale GPU orchestration, inference optimization, compute, storage, networking and applied AI. Listed on Nasdaq (NBIS) and headquartered in Amsterdam, it has a global footprint with R&D hubs across Europe, the UK, North America and Israel, and a team of 1,500+ employees, including hundreds of engineers with deep hardware, software and AI R&D expertise.

About the Role

The Lead Software Systems Engineer - GPU Performance will play a key role in building Nebius's 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. The role operates across the full stack-from hardware and system software to networking (InfiniBand/RoCE), virtualization (KVM/QEMU), and distributed communication layers such as MPI and NCCL.

Responsibilities

  • ● Focus on understanding system behavior across multiple layers, identifying performance bottlenecks, and driving improvements that shape how clusters are built, operated, tuned, and validated.
  • ● Investigate and troubleshoot performance issues of GPU clusters under real workloads, including 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.
  • ● Work closely with infrastructure, software engineering, and hardware vendor teams such as NVIDIA, Mellanox, and Intel.
  • ● Contribute to hardware and cluster qualification (acceptance), ensuring 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, including 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 such as C/C++, Go, or Python.

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 and 12 weeks for secondary caregivers.
  • ● Remote work reimbursement: Up to 85 per month for mobile and internet.
  • ● Disability and life insurance.