Yutaro Hayakawa
Software Engineering Technical Leader at Isovalent
San Jose, California, United States
Summary
🤩
Rockstar🎓
Top SchoolYutaro Hayakawa is a Software Engineering Technical Leader with 11 years of experience focused on cloud-native networking, eBPF, and high-performance dataplane engineering. Based in San Jose, he drives Cilium’s traffic engineering and enterprise network integrations (BGP, SRv6 L3VPN), blending hands-on kernel and datapath work with team leadership. His open-source contributions to the widely used Cilium project include SRv6 encapsulation, conntrack/NAT fixes, and core datapath optimizations, reflecting deep expertise in container networking and eBPF. Previously he built scalable LBaaS components and IPv6, connection-tracking, and health-check systems at LINE, and ported generic eBPF to FreeBSD during GSoC. He combines research-backed systems work (papers at NSDI and SoCC lineage) with production-grade delivery, and has a practical knack for kernel debugging tools—authoring ipftrace2 to aid network diagnosis.
11 years of coding experience
6 years of employment as a software developer
Master of Media and Governance (Cyber Informatics Program completed), Master of Media and Governance (Cyber Informatics Program completed) at Keio University
Github Skills (13)
srl10
network10
r610
container10
go10
srs10
networking10
ebpf10
srv10
linux-kernel9
kubernetes8
kubernetes-pods8
devops8
Programming languages (6)
Github contributions (5)
cilium/cilium
Nov 2017 - Mar 2025
eBPF-based Networking, Security, and Observability
Role in this project:
Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:752 reviews, 274 PRs, 157 pushes in 7 years 5 months
Contributions summary:Yutaro contributed significantly to the Cilium project, focusing on networking and infrastructure components. Their work included implementing features related to SRv6 (Segment Routing over IPv6) encapsulation, including handling packets across the network and integrating with existing network components. They also addressed and fixed several bugs related to BPF (Berkeley Packet Filter) and conntrack/NAT operations, and optimized various core networking functionalities within the project. Furthermore, they have demonstrated a deep understanding of container networking, making improvements to core data-path logic.
bpfcontainerskerneltroubleshootingkubernetes-networking
generic-ebpf/generic-ebpf
Aug 2017 - May 2021
Generic eBPF runtime
Contributions:531 commits, 2 PRs, 422 pushes in 3 years 10 months
runtimeebpfgeneric
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