Senior Hardware engineer (R&D / GPU / AI)

About Nebius: 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. Listed on Nasdaq (NBIS) and headquartered in Amsterdam, we have a global footprint with R&D hubs across Europe, the UK, North America and Israel. Our team of 1,500+ includes hundreds of engineers with deep expertise across hardware, software and AI R&D. The role Nebius is looking for a System Engineer (Servers Hardware R&D Team) to support our expanding North American operations. This position requires occasional on-site presence in our Data Center locations as needed. Your responsibilities will include: • Participate in the design, deployment, and maintenance of high-performance cloud systems optimized for AI workloads. • Arrange and perform hardware R&D tests and experiments on-site in data center environments. • Troubleshoot and resolve complex system issues related to GPUs, networking (InfiniBand, NVLink), PCIe, and server infrastructure. • Conduct deep investigations into hardware, software, and networking issues to ensure optimal system performance and reliability. • Develop and execute test plans and methodologies for advanced GPU, InfiniBand, and compute systems to benchmark and validate performance. • Collaborate closely with cross-functional engineering and operations teams to improve system performance and reliability. • Monitor system performance and continuously fine-tune configurations for maximum efficiency. What we expect you to have: • Strong knowledge of modern server architecture, particularly in high-performance, GPU-based environments. • Hands-on experience with GPUs, networking, NVLink, and PCIe technologies. • Proficiency in Linux systems, with experience using Python and Bash for automation and tooling. • 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. • Basic electronics modification skills, including soldering and wiring. It will be an added bonus if you have: • Knowledge of the Linux kernel and experience with kernel-level debugging or troubleshooting. • Familiarity with electronic measurement equipment such as oscilloscopes and multimeters. 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 $150k- $200k base + quarterly performance bonuses. Join Nebius Today! Benefits & Perks: • Competitive compensation • Career growth and learning opportunities • Flexibility and ownership • Collaborative and innovative culture • Opportunity to work on impactful AI projects • International environment and talented teams What's it like to work at Nebius: Fast moving - Bold thinking - Constant growth - Meaningful impact - Trust and real ownership - Opportunity to shape the future of AI Equal Opportunity Statement: 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.