Senior Network Engineer

About this role

<div class="content-intro"><p><strong>About Nebius:</strong></p> <p>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.</p> <p>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.</p> <p>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.</p></div><div class="flex flex-col text-sm pb-25"> <section class="text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [&:has([data-writing-block])>*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]" data-turn-id="request-WEB:15eea77a-430d-424c-853f-ddcbc7d37ef3-17" data-testid="conversation-turn-8" data-scroll-anchor="true" data-turn="assistant"> <div class="text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)"> <div class="[--thread-content-max-width:40rem] @w-lg/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn"> <div class="flex max-w-full flex-col gap-4 grow"> <div class="min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+&]:mt-1" data-message-author-role="assistant" data-message-id="e059322a-3ddb-47fa-9208-b7937bc6252b" data-turn-start-message="true" data-message-model-slug="gpt-5-3"> <div class="flex w-full flex-col gap-1 empty:hidden"> <div class="markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling"> <p data-start="0" data-end="573"><strong data-start="0" data-end="13">The role:</strong></p> <p data-start="0" data-end="573"><br>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.</p> <p data-start="575" data-end="614"><strong data-start="575" data-end="614">Your responsibilities will include:</strong></p> <ul data-start="615" data-end="1773"> <li data-section-id="6t4v68" data-start="615" data-end="743"> <p data-start="617" data-end="743">Design and evolve scalable data center network architectures (CLOS/leaf-spine) for high-throughput, low-latency environments</p> </li> <li data-section-id="1deld5v" data-start="744" data-end="869"> <p data-start="746" data-end="869">Own end-to-end deployment and lifecycle management of routing and switching infrastructure across production environments</p> </li> <li data-section-id="36utkw" data-start="870" data-end="962"> <p data-start="872" data-end="962">Develop and maintain network design documentation, standards, and operational procedures</p> </li> <li data-section-id="2xo0t9" data-start="963" data-end="1071"> <p data-start="965" data-end="1071">Plan, execute, and validate network infrastructure testing, including vendor evaluation and benchmarking</p> </li> <li data-section-id="10ml0gh" data-start="1072" data-end="1188"> <p data-start="1074" data-end="1188">Diagnose and resolve complex network issues across the TCP/IPv4/v6 stack in large-scale distributed environments</p> </li> <li data-section-id="1hncgsx" data-start="1189" data-end="1311"> <p data-start="1191" data-end="1311">Optimize traffic engineering, ECMP, and load balancing strategies to ensure efficient utilization of network resources</p> </li> <li data-section-id="p5yx8t" data-start="1312" data-end="1416"> <p data-start="1314" data-end="1416">Implement and operate MPLS-based technologies, including L3 VPNs and segment routing (SR-MPLS, SRv6)</p> </li> <li data-section-id="kwzb6m" data-start="1417"…