L3 Support Engineer

About the Position

Join Nebius as a L3 Support Engineer to lead deep technical investigations and drive permanent fixes for datacenter servers and Linux diagnostics.

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

Deep Technical Investigation (Primary Focus)

• Lead root cause analysis beyond L2 depth (GPU failures, firmware issues, Linux-level faults, HW/SW interactions).
• Detect recurring patterns across sites and convert findings into durable fixes.
• Own technical workstreams during high-severity incidents.

Vendor & R&D Collaboration

• Build evidence packs and drive escalations with ODM and R&D.
• Push for firmware, component, and platform-level resolutions.
• Track outcomes and ensure knowledge flows back to operations.

Firmware & Platform Readiness (BIOS/BMC)

• Support validation and rollout of firmware updates (risk assessment, staging, rollback planning).
• Help operationalize platform standards across datacenters.

Knowledge & Enablement

• Create scalable runbooks, troubleshooting guides, and error catalogs.
• Turn investigations into playbooks that elevate L1/L2 teams.

Hands-on Support (As Needed)

• Travel to datacenters for complex troubleshooting, new platform readiness, or incident containment.

Requirements

• Strong hands-on experience with datacenter servers and deep Linux troubleshooting.
• Ability to diagnose across hardware, BIOS/BMC firmware, and Linux (logs, drivers, storage basics, performance triage).
• Structured incident response experience and clear communication under pressure.
• Experience driving evidence-based escalations with vendors/R&D.
• Fluent English (written and spoken).

Nice to Have

• Strong familiarity with GPU server platforms and tooling (for example: nvidia-smi, dcgmi, Linux logs correlation).
• Experience with ipmitool and Redfish workflows, firmware lifecycle, and staged rollouts.
• Scripting skills (bash and basic Python) for log collection, triage automation, and simple reliability analysis.
• Exposure to OCP-based platforms and ODM manufacturing ecosystems.
• Experience supporting enterprise bare metal customers under contractual SLAs.

We Offer

• 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

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.

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Location: Mäntsälä, Finland

Employment Type: Full-time

Experience Level: Senior