DWDM-IP Engineer

Details

Nebius is leading a new era in cloud computing to serve the global AI economy. We create tools and resources for customers to solve real-world challenges and transform industries without massive infrastructure costs or the need to build large in-house AI/ML teams. Headquartered in Amsterdam and listed on Nasdaq, Nebius has R&D hubs across Europe, North America, and Israel and a global team of engineers across hardware and software.

This role is for an Optical & IP Transport Engineer (DWDM/IP) to own the design, deployment, and operation of large-scale optical transport networks supporting high-density, latency-sensitive infrastructure. You will work at the intersection of DWDM systems and IP/MPLS layers to ensure reliable packet delivery across long-haul and metro fiber networks. The position requires deep understanding of optical physics and packet transport, hands-on responsibility for production networks, automation-driven operations, and the ability to operate close to hardware in mission-critical environments.

Responsibilities

• Design, deploy, and operate DWDM-based transport networks across long-haul and metro environments
• Perform wavelength provisioning, optical power tuning, and amplification design (EDFA/Raman) to ensure optimal link performance
• Troubleshoot cross-layer issues spanning optical transport and IP/MPLS networks, including packet loss, latency, and signal degradation
• Execute fiber characterization and fault isolation using OTDR, OSA, and BERT tools across various span distances
• Work directly with production platforms (Ciena, Infinera, ADVA) for provisioning, upgrades, and incident resolution
• Develop and maintain Python-based automation for optical health checks, telemetry ingestion, and inventory synchronization
• Participate in network expansions and hardware deployments, including on-site support for critical rollouts and audits
• Collaborate with IP engineering teams to ensure alignment between optical transport and routing layers
• Drive root cause analysis and implement preventive measures to improve fleet-wide reliability and performance

Requirements

• Strong expertise in DWDM systems, including wavelength routing, optical amplification (EDFA/Raman), and dispersion management in long-haul networks
• Solid understanding of IP/MPLS fundamentals, including routing protocols (BGP, OSPF, IS-IS) and MPLS signaling
• Hands-on experience with production optical platforms such as Ciena (6500/Waveserver), Infinera, or ADVA
• Proficiency in Python for automation of operational workflows and network validation tasks
• Experience using optical diagnostic tools (OTDR, OSA, BERT) for fiber analysis and troubleshooting
• Ability to debug packet-over-optical issues across layers with precision and speed
• Willingness to travel to data center and network sites across the US/EU for deployments and audits

Nice to have

• Experience with Linux-based network management systems and streaming telemetry for optical monitoring
• Background in network modernization projects, including migrations from 100G to 400G/800G architectures
• Familiarity with Segment Routing (SR-MPLS or SRv6) and its interaction with optical transport performance

Working conditions

• Remote role based in the United States
• Travel required for on-site deployments and physical-layer audits

Benefits

• Comprehensive health insurance (medical, dental, vision)
• 401(k) plan with company contribution
• Generous paid time off and sick leave
• Paid parental leave
• Flexible working hours
• Professional development support

Compensation

• Base salary: $125,000 – $180,000 per year
• Performance-based bonus included