CoreWeave · 3 hours ago
Senior Engineer, Cilium CNI & Cloud Networking
Sunnyvale, CA
Full-time
Hybrid
Senior Level
$165K/yr - $242K/yr
5+ years expCoreWeave is The Essential Cloud for AI™, delivering a platform of technology and tools for innovators to build and scale AI. The Senior Engineer will design, build, and operate the container networking layer for CoreWeave’s Kubernetes platforms, ensuring high availability, security, and performance while collaborating with various engineering teams.
Artificial Intelligence (AI)Cloud ComputingInformation TechnologyAI InfrastructureCloud InfrastructureMachine Learning
No H1B
U.S. Citizen Only
Responsibilities
Design, build, and operate the container networking layer that underpins CoreWeave’s Kubernetes platforms
Evolve our CNI stack to support large, high-density GPU clusters with demanding throughput and latency requirements
Partner closely with Kubernetes, Infrastructure, and Network Services engineers to ensure the platform is highly available, observable, and secure
Shape how our networking platform scales for future growth
Qualification
Required
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
Preferred
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
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
Company
CoreWeave
CoreWeave is a cloud-based AI infrastructure company offering GPU cloud services to simplify AI and machine learning workloads.
1001-5000 employees
Funding
Current Stage
Public CompanyTotal Funding
$26.87BKey Investors
NVIDIAGoldman Sachs,JP Morgan Chase,Morgan Stanley,MUFG Union BankJane Street Capital
2026-01-26Post Ipo Equity· $2B
2025-12-08Post Ipo Debt· $2.54B
2025-11-12Post Ipo Debt· $2.5B
Leadership Team
Michael Intrator
Chief Executive Officer
Brannin McBee
Founder & CDO
Recent News
2026-02-11
2026-02-11
Company data provided by crunchbase