CoreWeave is looking for a Senior Engineer to design, build, and operate the container networking layer that underpins CoreWeave's Kubernetes platforms. The team works on evolving the CNI stack to support large, high-density GPU clusters with demanding throughput and latency requirements.
Requirements
- 5+ years of experience as a Software, Systems, or Network 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, Python, 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.
Benefits
- Medical, dental, and vision insurance
- 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
