Senior Specialist Field Engineer - Networking

Fdetimes; Greater London; Hybrid; GBP 89,000 - 134,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

401(k) with employer match

Flexible PTO

Paid Parental Leave

Job summary

CoreWeave is seeking a Senior Specialist Field Engineer for Networking to design and optimize network architectures across multi-cloud and hybrid Kubernetes environments. You will troubleshoot complex issues across Linux kernels, CNI, and data-center fabric, and collaborate with engineering to close performance gaps on real workloads.

You will lead customer workshops and PoCs, with occasional travel, and contribute to product roadmap discussions.

Qualifications

• 7+ years building or operating large-scale networks in a technical field role.
• Solid knowledge of BGP, VXLAN/EVPN, and DNS.
• Deep understanding of Kubernetes networking and CNIs.

Responsibilities

• Design network architecture for complex customers across multi-cloud, multi-region and hybrid Kubernetes environments.
• Troubleshoot issues spanning nodes, VPCs, kernel, CNI, and data-center fabric.
• Identify product gaps and work with engineering to address real workloads.
• Lead customer overviews, PoCs, and workshops, with occasional travel.

Skills

Network design

Troubleshooting

Kubernetes networking

BGP

VXLAN/EVPN

DNS

CNIs (Cilium/Calico)

Linux kernel debugging

InfiniBand/RoCE

Cloud connectivity (VPC, VPNs)

Education

B.S. in Computer Science or related

Tools

FRR

OVS

eBPF

Cilium

Calico

Job description

CoreWeave is The Essential Cloud for AI™. Built for pioneers by pioneers, CoreWeave delivers a platform of technology, tools, and teams that enables innovators to build and scale AI with confidence. Trusted by leading AI labs, startups, and global enterprises, CoreWeave combines superior infrastructure performance with deep technical expertise to accelerate breakthroughs and turn compute into capability. Founded in 2017, CoreWeave became a publicly traded company (Nasdaq: CRWV) in March 2025. Learn more at www.coreweave.com.

What You’ll Do

The Customer Experience (CX) Organization at CoreWeave is dedicated to ensuring every client running AI workloads at scale has a seamless, reliable, and high-performance experience. This team supports the infrastructure that powers the AI revolution—working across data centers, hardware systems, and customer workloads to maintain the integrity of our cloud platform. The CX organization aligns closely with the internal and customer engineering teams, offering valuable insights from the field and having the chance to contribute to the CoreWeave product roadmap and development.About the role

CoreWeave runs some of the largest GPU clusters in the world, and the network has a lot to do with how well they perform. As a Senior Specialist Field Engineer for Networking, you'll help customers get the most from the GPU fabric, the front-end network, and the links between data centers. You'll work closely with the Networking product and engineering teams, and what you learn in the field will help shape what they build.

In this role, you will

• Design network architecture for complex customers (multi-cloud, multi-region, hybrid Kubernetes, bare metal, Direct Connect), including how it fails and what each failure affects.
• Troubleshoot problems that span many nodes and VPCs, from the Linux kernel and the CNI up through the data-center fabric and HPC interconnects (InfiniBand, RoCE).
• Find where the product falls short for real workloads and work the gap through with engineering, as an extended member of the Networking team.
• Lead customer technical overviews, proofs of concept, and customer workshops, with occasional travel.

Who You Are

• B.S. in Computer Science or a related technical discipline, or equivalent experience.
• 7+ years building or operating large-scale networks, as a network, systems, or software engineer, or in a deeply technical networking-focused field role.
• Solid working knowledge of network protocols such as BGP, VXLAN/EVPN, and DNS.
• Deep understanding of Kubernetes networking, including CNIs such as Cilium or Calico.
• Expertise in cloud connectivity: VPCs, peering, dedicated interconnects, and VPNs such as WireGuard or Tailscale, and the trade-offs between them.
• Very comfortable going below the tooling to analyze packet captures, kernel routing tables, interface and fabric counters.
• You explain technical problems clearly to engineers and executives, and you build trust with customers.

Preferred

• Expertise with InfiniBand and RoCE, including fabric diagnostics, subnet management, and partition-based tenant isolation.
• Experience with NVIDIA GPUs, especially GB200/GB300 platforms.
• First-principles debugging through the Linux kernel network stack, eBPF, FRR, and OVS.
• Diagnosing distributed failures across hundreds of nodes, such as ECMP blackholing across fabric planes.
• Large Direct Connect designs: per-VPC BGP sessions, prefix strategy, and cloud provider limits.
• Contributions to networking open source (kernel, FRR, Cilium, OVS) or published work on fabric design or network debugging.

Wondering if you’re a good fit?

We believe in investing in our people, and value candidates who can bring their own diversified experiences to our teams – even if you aren't a 100% skill or experience match. Here are a few qualities we’ve found compatible with our team. If some of this describes you, we’d love to talk.

• You'd rather look at a packet capture than guess.
• You're comfortable saying "I don't know yet," and then you go find out.
• You like working on a hard problem alongside the customer and the engineering team, and you share the credit.

Why CoreWeave?

At CoreWeave, we work hard, have fun, and move fast! We’re in an exciting stage of hyper-growth that you will not want to miss out on. We’re not afraid of a little chaos, and we’re constantly learning. Our team cares deeply about how we build our product and how we work together, which is represented through our core values:

• Be Curious at Your Core
• Act Like an Owner
• Empower Employees
• Deliver Best-in-Class Client Experiences
• Achieve More Together

We support and encourage an entrepreneurial outlook and independent thinking. We foster an environment that encourages collaboration and provides the opportunity to develop innovative solutions to complex problems. As we get set for take off, the growth opportunities within the organization are constantly expanding. You will be surrounded by some of the best talent in the industry, who will want to learn from you, too. Come join us!

The starting salary will be determined by job-related knowledge, skills, experience, and the market location. We strive for both market alignment and internal equity when determining compensation. In addition to base salary, our total rewards package includes a discretionary bonus, equity awards, and a comprehensive benefits program (all based on eligibility).

What We Offer

The range we’ve posted represents the typical compensation range for this role. To determine actual compensation, we review the market rate for each candidate which can include a variety of factors. These include qualifications, experience, interview performance, and location.

In addition to a competitive salary, we offer a variety of benefits to support your needs. The benefits below reflect our US-based offerings for full-time employees; for roles in other locations, benefits vary and are shared during the hiring process. These include:

• Medical, dental, and vision insurance - 100% paid for by CoreWeave
• Company-paid Life Insurance
• Voluntary supplemental life insurance
• Short and long-term disability insurance
• Flexible Spending Account
• Health Savings Account
• Tuition Reimbursement
• Ability to Participate in Employee Stock Purchase Program (ESPP)
• Mental Wellness Benefits through Spring Health
• Family-Forming support provided by Carrot
• Paid Parental Leave
• Flexible, full-service childcare support with Kinside
• 401(k) with a generous employer match
• Flexible PTO
• Catered lunch each day in our office and data center locations
• A casual work environment
• A work culture focused on innovative disruption

California Applicants

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Equal Opportunity & Accommodations

CoreWeave is an equal opportunity employer, committed to fostering an inclusive and supportive workplace. All qualified applicants and candidates will receive consideration for employment without regard to race, color, religion, sex, disability, age, sexual orientation, gender identity, national origin, veteran status, or genetic information.

As part of this commitment and consistent with the Americans with Disabilities Act (ADA), CoreWeave will ensure that qualified applicants and candidates with disabilities are provided reasonable accommodations for the hiring process, unless such accommodation would cause an undue hardship. If reasonable accommodation is needed, please contact: [e-mail].

Export Control Compliance

This position requires access to export controlled information. To conform to U.S. Government export regulations applicable to that information, applicant must either be (A) a U.S. person, defined as a (i) U.S. citizen or national, (ii) U.S. lawful permanent resident (green card holder), (iii) refugee under 8 U.S.C. § 1157, or (iv) asylee under 8 U.S.C. § 1158, (B) eligible to access the export controlled information without a required export authorization, or (C) eligible and reasonably likely to obtain the required export authorization from the applicable U.S. government agency. CoreWeave may, for legitimate business reasons, decline to pursue any export licensing process.