Senior Engineer, Cilium CNI & Cloud Networking

• 5+ years of experience as a Software Engineer or Systems Engineer working on cloud infrastructure or large-scale distributed systems.
  
  
• Hands-on production experience with Cilium CNI (or equivalent advanced CNIs), including cluster configuration and lifecycle management.
  
  
• Strong understanding of Cilium’s eBPF datapath, policy model, and load-balancing mechanisms.
  
  
• Deep knowledge of cloud networking concepts, including VPCs, subnets, routing, security groups/ACLs, NAT, and ingress/egress architectures.
  
  
• Experience designing multi-tenant network architectures with strong isolation and security.
  
  
• Solid grounding in TCP/IP, dynamic routing (e.g., BGP), ECMP, MTU/fragmentation, and overlay/underlay networking (VXLAN, Geneve, encapsulation).
  
  
• Experience with network observability and troubleshooting across L3–L7.
  
  
• Proficiency in at least one systems language such as Golang or C/C++.
  
  
• Experience working in modern CI/CD environments.
  
  
• Experience operating Kubernetes at scale, including cluster lifecycle management and debugging networking issues across pods, nodes, and external services.
  
  
• Demonstrated ownership of complex systems end-to-end.
  
  

• Experience operating cloud-scale network services across tens of thousands of nodes and multiple regions.
  
  
• Contributions to Cilium, Kubernetes, or related open-source networking projects.
  
  
• Experience with eBPF development and performance tuning.
  
  
• Experience building Kubernetes operators or controllers.
  
  
• Familiarity with service meshes, multi-cluster networking, or cluster mesh solutions.
  
  
• Experience in GPU-heavy, HPC, or other performance-sensitive environments.
  
  

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.

California Consumer Privacy Act - California applicants only

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: careers@coreweave.com.

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.