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: We are seeking a Staff Network Security Engineer to architect the defense of our global backbone, edge, and massive-scale GPU clusters. We are looking for a builder, not an administrator. You will move beyond "configuring firewalls" to engineering security into the network fabric itself—utilizing telemetry, automation, and deep protocol On this team, you will: * Unravel and tackle network security challenges at an exhilarating global scale. * Collaborate with exceptional network architects and engineers building the backbone infrastructure for the AI revolution. * Enjoy the freedom and support to experiment, innovate, and significantly shape our approach to securing the underlay and overlay of our cloud. ABOUT THE ROLE: In this role, you will: * Conducting architecture reviews, protocol analysis, and design assessments to proactively identify and fix vulnerabilities in our backbone and data center fabrics. * Developing robust, repeatable frameworks for network security automation (CoPP, ACL generation, Route Filtering) that make it easy for teams to build securely from day one. * Collaborating closely with Network Engineering teams to integrate security checks and validation seamlessly into their CI/CD and config-push pipelines. * Crafting clear, practical security guidance and documentation that empowers engineers to deploy secure routing policies and topologies. * Actively participating in architectural discussions regarding peering, transit, and traffic engineering, providing insightful security recommendations. * Occasionally, 'drawing the owl' - figuring out innovative solutions for securing massive throughput environments while navigating ambiguous situations. WHO YOU ARE: * 7+ years of experience directly focused on Network Engineering, Infrastructure Security, or ISP/Backbone operations. * Strong skills in core network protocols (BGP, OSPF/IS-IS, TCP/IP) and deep knowledge of how they function at the packet level. * Solid experience developing network automation or security tooling in Go, Python, or similar modern languages. * Proven experience collaborating with network architects to implement secure designs in multi-vendor environments (Arista EOS, SONiC, Juniper, etc.). * Excellent ability to negotiate and reach consensus with engineers and fellow security practitioners, as well as excellent technical documentation skills. * Familiarity with Linux networking internals, control plane protection, and managing infrastructure as code. Preferred: * Hands-on experience with hyperscale network architectures (CLOS fabrics, MPLS/EVPN, VXLAN) and the unique security challenges of high-performance computing. * Familiarity with hardware-level networking security (SmartNICs/DPUs, connectX) and flow-based telemetry analysis. * Deep understanding of internet routing security standards (RPKI, MANRS) and advanced DDoS mitigation strategies at the network layer. * Hands-on experience with Infiniband and RoCE 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 base salary range for this role is $188,000 to $275,000. The starting salary will be determined based on job-related knowledge, skills, experience, and 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 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 California Consumer Privacy Act  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: [email protected]. 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.