Senior AI Infrastructure Systems Engineer (R&D / GPU / AI)

About the Position

Join Nebius as a Senior AI Infrastructure Systems Engineer focusing on diagnosing and resolving complex hardware and platform failures in high-performance AI infrastructure.

About the Company

Nebius is leading a new era in cloud infrastructure for the global AI economy. We are building a full-stack AI cloud platform that supports developers and enterprises from data and model training through to production deployment, without the cost and complexity of building large in-house AI/ML infrastructure.

Built by engineers, for engineers. From large-scale GPU orchestration to inference optimization, we own the hard problems across compute, storage, networking and applied AI.

Responsibilities

• Form technical hypotheses, design targeted tests, analyze system logs, and distinguish between various hardware failures.
• Work across Linux, GPU servers, PCIe, firmware, power, and cooling to determine the true root cause of issues.
• Utilize deep knowledge of modern server architecture, particularly in high-performance, GPU-based environments.
• Benchmark systems for performance, stability, power efficiency, thermal behavior, and workload characteristics.

Requirements

• Minimum 5 years of hands-on systems engineering experience across Linux, server hardware, firmware, PCIe, and GPU or high-performance computing platforms.
• Extensive Linux experience, particularly using Linux as an environment for hardware debugging, system-level troubleshooting, and platform investigation.
• Knowledge of the Linux kernel and experience with kernel-level debugging or troubleshooting.
• Strong knowledge of modern server architecture, particularly in high-performance, GPU-based environments.
• Strong knowledge of NVIDIA GPU platforms and diagnostic tooling, including nvidia-smi, XID and SXID analysis, GSP and driver behavior, NVLink, NVSwitch, Fabric Manager, DCGM diagnostics, and NCCL testing.
• Deep knowledge of PCIe, including topology, enumeration, root complexes, endpoints, switches, bridges, retimers, link speed and width, AER and DPC errors, completion timeouts, and link failures.
• Experience benchmarking systems for performance, stability, power efficiency, thermal behavior, and workload characteristics.
• In-depth understanding of firmware interactions across BIOS/UEFI, BMC, CPLD/FPGA, GPU firmware, NIC firmware, and other platform components.
• Experience with low-level hardware communication and debugging using I²C, SMBus, PMBus, register maps, bit masks, byte- and word-level data, and device datasheets.
• Demonstrated ability to troubleshoot complex hardware, software, and networking issues.
• Experience with deep problem investigation, root cause analysis, and performance optimization in cloud or high-performance computing environments.
• Strong analytical and problem-solving skills with a performance-first mindset.
• Scripting and automation using various languages (Python/Go).

We Offer

• Competitive salary ranging from $179,500 - $224,300 + quarterly performance bonuses.
• 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.

About the Company

Nebius is an equal opportunity employer. We are committed to fostering an inclusive and diverse workplace and to providing equal employment opportunities in all aspects of employment. We do not discriminate on the basis of race, color, religion, sex (including pregnancy), national origin, ancestry, age, disability, genetic information, marital status, veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by applicable law.

Applicants must be authorized to work in the country in which they apply and will be required to provide proof of employment eligibility as a condition of hire.

If you need accommodations during the application process, please let us know.