DWDM-IP Engineer

Why work at Nebius Nebius is leading a new era in cloud computing to serve the global AI economy. We create the tools and resources our customers need to solve real-world challenges and transform industries, without massive infrastructure costs or the need to build large in-house AI/ML teams. Our employees work at the cutting edge of AI cloud infrastructure alongside some of the most experienced and innovative leaders and engineers in the field. Where we work Headquartered in Amsterdam and listed on Nasdaq, Nebius has a global footprint with RD hubs across Europe, North America, and Israel. The team of over 1400 employees includes more than 400 highly skilled engineers with deep expertise across hardware and software engineering, as well as an in-house AI RD team. The role: We are looking 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, ensuring reliable packet delivery across long-haul and metro fiber networks. This role requires deep understanding of optical physics and packet transport, with hands-on responsibility for production networks. You will be involved in end-to-end lifecycle management—from planning and turn-up to troubleshooting complex cross-layer issues impacting performance and availability. The position demands strong diagnostic capabilities, automation-driven operations, and the ability to operate close to the hardware in mission-critical environments. Your responsibilities will include: 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 What we expect you to have: 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 such as BGP, OSPF, or 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 It will be an added bonus if you 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 Key employee benefits: Compr ... (truncated, view full listing at source)