Senior HPC Systems Engineer: GPU Clusters & AI Infra

Nebius; United States; Remote; USD 180,000 - 240,000; Full time

Benefits offered by this job

Competitive pay

Career growth

Flexibility and ownership

Collaborative culture

Impactful AI projects

International teams

Job summary

Nebius is seeking a Senior Systems HPC Engineer to optimize large-scale GPU clusters and run across the full stack from hardware to software. You will identify bottlenecks, validate performance improvements, and work with teams across infra, software, and hardware vendors.

Ideal candidates bring 5+ years in system-level software performance, Linux expertise, and strong C/C++/Go/Python skills. The role offers an international, fast-moving environment with opportunities to influence AI-scale

Qualifications

• 5+ years in system-level software development focused on performance optimization.
• 3+ years with Linux systems (administration, troubleshooting, performance tuning).
• Deep understanding of server architecture including PCIe devices, NICs, Linux OS/Kernel, and HPC systems.
• Proficiency in performance-oriented languages: C/C++, Go, Python.

Responsibilities

• Analyze system behavior across multiple layers to identify bottlenecks and drive improvements for GPU clusters.
• Troubleshoot performance issues under real workloads (training and inference).
• Evaluate and integrate new hardware, configurations, and tuning approaches via software stack.
• Collaborate with infra, software, and hardware vendor teams (NVIDIA, Mellanox, Intel) on performance.
• Contribute to hardware and cluster qualification ensuring systems meet performance targets.
• Support performance escalations from internal teams and customers.

Skills

System-level software

Linux systems

Performance optimization

C/C++

Python

Tools

KVM/QEMU

MPI/NCCL

Job description

Nebius is seeking a Senior Systems HPC Engineer to optimize large-scale GPU clusters and run across the full stack from hardware to software. You will identify bottlenecks, validate performance improvements, and work with teams across infra, software, and hardware vendors.

Ideal candidates bring 5+ years in system-level software performance, Linux expertise, and strong C/C++/Go/Python skills. The role offers an international, fast-moving environment with opportunities to influence AI-scale