Jun Mukai
Mountain View, California, United States
Summary
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RockstarJun Mukai is a seasoned software engineer with 20 years of experience, currently building backend systems at Arta Finance after roles at CloudNatix and a long tenure at Google. He specializes in distributed and asynchronous systems, Kubernetes, performance analysis, and API design (gRPC/REST/GraphQL), and is fluent in Go, Python, C++, and TypeScript/JavaScript. His open-source contributions span notable projects—from improving Android RecyclerView behavior and ChromeOS windowing to implementing grapheme-aware text handling in the xi-editor and generating Gapic clients for Google Cloud libraries—demonstrating both low-level systems skill and API/tooling expertise. Comfortable across frontend, backend, and infra, Jun has repeatedly shipped production-grade components such as Istio backends, Cloud API clients, and cluster autoscaling tools. He holds a Ph.D. in Computer Science from Keio University, bringing research rigor to pragmatic engineering that improves performance and UX in subtle but impactful ways.
20 years of coding experience
Github Skills (40)
apim10
google-cloud-platform10
back-end-development10
apidoc10
redis10
protocol-buffers10
api-client10
ui-design10
android-recyclerview10
data-structure10
java10
ruby10
gcp10
javas10
uid10
Programming languages (15)
Github contributions (5)
googleapis/gapic-generator
Feb 2016 - Mar 2017
Tools for generating API client libraries from API Service Configuration descriptions.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:88 commits, 119 PRs, 56 pushes in 1 year
Contributions summary:Jun contributed to the initial implementation and subsequent enhancements of a Go language provider within a code generation tool. This provider focuses on generating API client libraries from API Service Configuration descriptions. The user's commits demonstrate a focus on defining core functionalities, implementing type names, and generating code for page streaming and gRPC methods. The work involves deep understanding of code generation, protocol buffer types, and Go programming.
api-clientapigrpcconfiguration-serviceclient-libraries
istio/istio
May 2017 - Apr 2018
Connect, secure, control, and observe services.
Role in this project:Back-end Developer
Back-end DeveloperContributions:118 commits, 116 PRs, 14 pushes in 10 months
Contributions summary:Jun primarily contributed to the backend aspects of the Istio project. Their work focused on implementing a Redis backend for the config store and related testing. They also made several updates related to validation. Further contributions involved the addition of features, fixing bugs, and refactoring existing code.
circuit-breakerenforce-policiesistioapi-managementmicroservice
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