Senior Engineer, Cilium CNI & Cloud Networking

CoreWeave is seeking a Senior Engineer to design, build, and operate the container networking layer for its Kubernetes platforms. The role requires 5+ years of experience as a Software Engineer or Systems Engineer working on cloud infrastructure or large-scale distributed systems. The ideal candidate will have hands-on production experience with Cilium CNI, strong understanding of cloud networking concepts, and experience designing multi-tenant network architectures.

Requirements

• 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
• Bachelor’s degree in Computer Science or a related field

Benefits

• 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