Senior Software Engineer, Network Infrastructure 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.

What You'll Do

CoreWeave runs one of the largest GPU clouds in the world, and the network underneath it has to be fast, reliable, and almost entirely self‑operating. Our Network Development team builds the software that makes that possible. We design, build, and run the platforms and services that provision, configure, automate, monitor, and heal the network, so that the people relying on it rarely have to think about it.

About the Role

• We're seeking a talented and experienced Senior Software Engineer to join our Network Development Team.
• In this role, you'll play a critical part in designing, developing, automating, and maintaining the networking software and infrastructure that powers CoreWeave's GPU cloud.
• Your day‑to‑day will involve writing code, creating configuration templates, designing dashboards, building CLI tools, and working closely with our Network Engineering and Network Observability teams to automate, operate, and monitor CoreWeave's network.
• Own the design, development, and long‑term health of the platforms and services that automate the network, including config generation, device provisioning, workflow automation, observability tooling, and internal CLIs and APIs.
• Plan and map out complex projects months in advance, sequencing the work, anticipating dependencies, and keeping several efforts moving in parallel.
• Lead technical direction through RFCs, design reviews, and architecture decisions, and break ambiguous problems down into shippable work.
• Write well‑tested, well‑documented software in Python and Go, and set the standard for quality across the team through strong test cases, clear error handling, and solid CI/CD practices.
• Improve the reliability and operability of what we run by defining service‑level indicators and objectives and relentlessly reducing manual toil through automation.
• Partner closely with Network Engineering, Observability, Fleet Engineering, and HPC teams so our automation fits cleanly into the wider system.
• Join the on‑call rotation once you are ramped, and help drive calm, blameless follow‑up when things break.
• Mentor other engineers, review code and designs, and help grow the technical skills of the team.
• Contribute to a positive, collaborative team and organizational culture.

Who You Are

• 8 or more years of professional software engineering experience, ideally building and operating production infrastructure, platform, or backend systems at scale.
• Strong proficiency in Python and Go.
• Solid understanding and experience in CI/CD (testing, code review, maintaining continuous builds and deployments).
• Strong understanding of managing runtime health for services and applications at an enterprise level.
• A love of process automation and toil elimination, with hands‑on experience building workflow automation or orchestration systems and automated device provisioning at scale such as Zero Touch Provisioning.
• Strong planning skills, including the ability to lay out and drive projects across a multi‑month horizon while keeping several concurrent efforts moving as part of a team.
• Strong, well‑reasoned technical opinions, paired with genuine openness to better ideas and other people's input.
• A solid understanding of core networking fundamentals, including IP addressing and subnetting, routing/switching, NTP, and DNS.
• Comfort with Linux and Kubernetes, and experience with infrastructure automation tooling such as Ansible and Jinja, a source‑of‑truth or IPAM and DCIM system such as NetBox, and observability tooling such as Prometheus and Grafana.
• Excellent written communication, a habit of writing documentation other people can actually use, and experience mentoring engineers and collaborating across teams.

Preferred

• A degree in Computer Science or a related field is a plus.

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.

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 enables the development of innovative solutions to complex problems. As we get set for takeoff, the organization's growth opportunities 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!

What We Offer

In addition to a competitive salary, we offer a variety of benefits to support your needs, including:

• 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.

Equal Opportunity

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.