Rei Shimizu
Senior Software Engineer at The Apache Software Foundation
Yokohama, Japan
Summary
👤
Senior🎓
Top SchoolRei Shimizu is a Senior Software Engineer based in Yokohama with eight years of experience building high-performance, scalable networking and cloud-native infrastructure. He designs and ships L7 proxies, load balancers, and service mesh platforms at scale—leading company-wide initiatives that run across hundreds of thousands of VMs and containerized microservices. Proficient in C++, Go, and Rust, Rei has a track record of heavy performance optimization (including a Rust rewrite that improved CPU efficiency 20x) and of producing lower-latency, cost-efficient alternatives to mainstream proxies. An active open-source maintainer and contributor, he’s shaped Envoy, Istio, and Apache SkyWalking integrations and speaks regularly at global conferences like KubeCon and ApacheCon. Beyond systems engineering, he contributes to language and localization efforts—maintaining the Japanese Swift project and co-authoring several translation books—bringing a rare mix of deep systems expertise and community stewardship.
8 years of coding experience
6 years of employment as a software developer
Master's degree, Computer Engineering, Master's degree, Computer Engineering at Waseda University
Japanese, Chinese
Github Skills (30)
programming-language10
swiftlint10
swift10
swiftui9
compliance9
dependency-injection8
xcode8
ios8
async7
algorithms7
nodejs7
container7
javascript7
css7
swift-framework7
Programming languages (6)
Github contributions (5)
treastrain/swift-migration-guide-jp
May 2024 - Mar 2025
Japanese translation of https://github.com/apple/swift-migration-guide
Contributions:110 reviews, 65 PRs, 110 pushes in 10 months
swiftswift6
stzn/TDDQiita
Jan 2020 - Sep 2025
This is a project for practice.
Contributions:3 reviews, 9 PRs, 15 pushes in 5 years 9 months
cssjavascriptnodejs
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