[Hiring] Senior Network Engineer @Nebius

Role Description

We are looking for a Senior Network Engineer to design, build, and operate large-scale, high-performance data center networks supporting GPU-dense AI workloads. You will take end-to-end ownership of service provider–grade and CLOS-based network infrastructure, ensuring reliability, scalability, and predictable performance across distributed environments. This role requires deep expertise in routing, switching, and modern data center fabrics, with a strong focus on production operations, root cause analysis, and continuous improvement of network systems.

• Design and evolve scalable data center network architectures (CLOS/leaf-spine) for high-throughput, low-latency environments
• Own end-to-end deployment and lifecycle management of routing and switching infrastructure across production environments
• Develop and maintain network design documentation, standards, and operational procedures
• Plan, execute, and validate network infrastructure testing, including vendor evaluation and benchmarking
• Diagnose and resolve complex network issues across the TCP/IPv4/v6 stack in large-scale distributed environments
• Optimize traffic engineering, ECMP, and load balancing strategies to ensure efficient utilization of network resources
• Implement and operate MPLS-based technologies, including L3 VPNs and segment routing (SR-MPLS, SRv6)
• Collaborate with hardware, systems, and software teams to integrate networking with compute and storage infrastructure
• Automate network operations and workflows to improve reliability, scalability, and operational efficiency
• Ensure high availability and performance of production networks through proactive monitoring and continuous improvement

Qualifications

• Expert-level knowledge (CCIE/JNCIE or equivalent) in MPLS, routing, and switching for service provider and data center networks
• Strong experience with Ethernet switching, VXLAN, and modern cloud overlay networking technologies
• Deep expertise in routing protocols including BGP and IS-IS
• Hands-on experience with segment routing (SR-MPLS, SRv6), L3 MPLS VPNs, and ECMP-based traffic balancing
• Proven experience designing and documenting large-scale network architectures
• Experience developing and executing network testing strategies and validating vendor solutions
• Strong troubleshooting skills across the TCP/IPv4/v6 stack in CLOS-based data center environments
• Solid understanding of network hardware architecture, QoS mechanisms, and packet processing pipelines
• Hands-on experience with network equipment from vendors such as Juniper, Arista, Huawei, and Mellanox
• Working proficiency in English

Requirements

• Working proficiency in an additional European language
• Experience with public cloud networking and GPU/InfiniBand environments
• Knowledge of software-defined networking (SDN) overlays in cloud environments
• Proficiency in Python, Go, or other programming languages in Linux environments
• Experience using programming languages for network automation and tooling

Benefits

• Comprehensive health insurance
• 401(k) plan with company contribution
• Paid time off and public holidays
• Flexible working hours
• Professional development and certification support

Compensation

$125,000 – $180,000 USD per year, depending on experience and qualifications

What we offer

• 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.