Senior Engineer - HPC Network in London

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.

We are looking for a highly motivated HPC Network Engineer to support the deployment and management of large‐scale data center infrastructure. This role places you at the forefront of high‐performance computing technologies, with a strong focus on Infiniband (IB) systems. You will work closely with global teams and customers to ensure optimal system performance, reliability, and scalability while driving continuous improvement through automation and operational excellence.

• Deploy and manage Infiniband network systems in high‐scale data center environments.
• Oversee the end‐to‐end lifecycle of IB hardware and software components.
• Develop and maintain tools to automate deployment, monitoring, and troubleshooting workflows.
• Analyze and resolve complex network performance, connectivity, and stability issues.
• Collaborate cross‐functionally with internal teams and external customers around the globe to ensure high‐quality outcomes.
• Participate in a rotating on‐call schedule to provide 24/7 operational support.

• Hands‐on experience with Infiniband networking technologies.
• Strong foundational knowledge of networking concepts and protocols.
• Experience using Grafana and PromQL for monitoring and visualization.
• Proficient in Linux systems administration.
• Experience with infrastructure‐as‐code tools such as Ansible and HELM.
• Proficiency in at least one scripting or programming language (e.g., Python, Go).
• Strong problem‐solving skills with a proven track record in troubleshooting complex infrastructure and application issues.
• Familiarity with diagnosing issues at the network and server hardware component level.
• Excellent verbal and written communication skills, with a collaborative mindset.

• Experience operating large‐scale environments with 1,000+ switches or nodes.
• Background in data center networking.
• Exposure to HPC‐specific workloads and architectures.
• Familiarity with NVIDIA UFM (Unified Fabric Manager).
• Experience with NCCL (NVIDIA Collective Communications Library).

The base pay and target total cash for this position range from $165,000 to $220,000. Pay is based on a number of factors including market location and may vary depending on job‐related knowledge, skills, and experience. This position includes a discretionary bonus, equity, and a comprehensive benefits package.

To fulfil our obligation to protect client data, successful applicants offered employment with CoreWeave will be required to complete a basic criminal record check, conducted in compliance with GDPR. Employment offers are conditional upon receiving satisfactory check results.

• Family‐level Medical Insurance
• Family‐level Dental Insurance
• Generous Pension Contribution
• Life Assurance at 4x Salary
• Critical Illness Cover
• Employee Assistance Programme
• Tuition Reimbursement
• Work culture focused on innovative disruption

Benefits may vary by location.

While we prioritize a hybrid work environment, remote work may be considered for candidates located more than 30 miles from an office, based on role requirements for specialized skill sets. New hires will be invited to attend onboarding at one of our hubs within their first month. Teams also gather quarterly to support collaboration.

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.

CoreWeave does not accept speculative CVs. Any unsolicited CVs received will be treated as the property of CoreWeave, and your Terms & Conditions associated with the use of CVs will be considered null and void.

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.