5+ years of experience in system-level software development emphasizing performance optimization.
3+ years of hands-on experience with Linux systems, including troubleshooting and performance tuning.
In-depth understanding of server architecture, PCIe devices, NICs, and HPC systems.
Strong proficiency in performance-oriented programming languages like C/C++, Go, or Python.
Familiarity with GPU architectures and distributed systems.
Responsibilities
Analyze system behavior to identify and resolve performance bottlenecks across layers.
Investigate performance issues of GPU clusters during real workload operations.
Evaluate and integrate new hardware and tuning methods through the software stack.
Provide support for performance-related escalations from internal teams and customers.
Collaborate with infrastructure, software engineering, and hardware vendors.
Benefits
100% company-paid health, dental, and vision insurance for employees and their families.
401(k) plan with up to 4% company match and immediate vesting.
20 weeks paid parental leave for primary caregivers and 12 weeks for secondary caregivers.
Remote work reimbursement of up to $85/month for mobile and internet expenses.
Company-paid short-term, long-term, and life insurance coverage.
Full Job Description
We are looking for a Lead Systems HPC Engineer 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).
We conduct coding interviews as part of the process.
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.
Compensation
We offer competitive salaries ranging from $170k-$300k OTE + equity based on your experience.
What we offer
Competitive salary and comprehensive benefits package.
Opportunities for professional growth within Nebius.
Flexible working arrangements.
A dynamic and collaborative work environment that values initiative and innovation.
We're growing and expanding our products every day. If you're up to the challenge and are excited about AI and ML as much as we are, join us!
