DWDM-IP Engineer

Nebius

19h•Remote

About The Position

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. 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.

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 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

Nice To Haves

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

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

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
Competitive salary and comprehensive benefits package.
Opportunities for professional growth within Nebius.
Flexible working arrangements.
A dynamic and collaborative work environment that values initiative and innovation.