DWDM-IP Engineer

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

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