Rungsikorn Rungsikavarnich
Software Engineer, Authentication
Tokyo, Japan
Summary
👤
Senior🎓
Top SchoolRungsikorn Rungsikavarnich is a software engineer with 11 years' experience building full-stack and cloud-native systems, currently focused on authentication and Identity Provider services for Woven by Toyota in Tokyo. He favors Rust and Golang while also bringing strong TypeScript and modern front-end skills (Angular/React), demonstrated by contributions to the widely used styled-components babel plugin where he added TypeScript import support and improved test coverage. His background spans fintech, enterprise, and product teams—including principal engineering at LSEG and technical leadership at KBTG—making him adept at bridging backend infrastructure and user-facing systems. Comfortable with Kubernetes and service mesh patterns (k8s, Istio), he combines pragmatic engineering with a taste for tooling and developer experience. Colleagues value his ability to move between low-level systems work and polish-focused front-end fixes, and his public GitHub shows a pattern of practical open-source improvements.
11 years of coding experience
12 years of employment as a software developer
Bachelor of Science (B.Sc.), Information Technology, Bachelor of Science (B.Sc.), Information Technology at King Mongkut's University of Technology ThonburiHigh Scool, Science, High Scool, Science at Darasamutr Sriracha
English, Thai
Stackoverflow
173reputation
21kreached
10answers
1question
Github Skills (18)
javascript10
testing10
styled-components10
babel-plugin10
babel-core10
babeljs10
typescripts8
typescript-types8
typescript8
minification7
fullscreen6
react6
delegates6
nodejs6
mongoose6
Programming languages (9)
Github contributions (5)
styled-components/babel-plugin-styled-components
Oct 2017 - Oct 2017
Improve the debugging experience and add server-side rendering support to styled-components
Role in this project:
Front-end Developer
Front-end DeveloperContributions:10 commits, 1 PR, 3 comments in 1 day
Contributions summary:Rungsikorn primarily focused on improving the functionality and accuracy of the `babel-plugin-styled-components` plugin. They implemented tests for default `require` statements within the plugin. They also corrected issues within the test files. Additionally, the user added support for TypeScript default imports and included changes related to minifying styles.
debuggingserver-side-renderingstyled-componentsminificationbabel
zapkub/react-images-preload
Oct 2016 - Aug 2023
Contributions:1 release, 15 pushes, 2 branches in 6 years 10 months
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