Koutaro Chikuba
フリーランス
Chiyoda, Japan
Summary
👤
Senior🎓
Top SchoolKoutaro Chikuba is a freelance software engineer with 14 years of experience delivering frontend optimization and AI automation. He has a strong track record across startups and tech companies, including Plaid, Quipper, and Aiming, shaping front-end and backend systems. An active open-source contributor, he refactored and migrated tests to TypeScript in the HonKit githon package, improving test coverage and build stability. Currently based in Chiyoda, Japan, he has continued freelancing since 2024, focusing on frontend performance and AI-driven automation solutions. Koutaro holds a Bachelor of Human Science/Information Science from Waseda University, reflecting a user-centered approach to engineering. His cross-disciplinary background helps translate complex requirements into robust, maintainable UI and automation pipelines.
14 years of coding experience
2 years of employment as a software developer
人間科学学士, 人間情報科学, 人間科学学士, 人間情報科学 at 早稲田大学
Stackoverflow
421reputation
15kreached
2answers
3questions
Github Skills (16)
gitbook10
typescript10
typescripts10
typescript-types10
testing10
jestjs9
javascript9
markdown-it8
markdown8
cicd8
storybook7
docbook7
textbook7
dynamic-import6
webpack6
Programming languages (17)
Github contributions (5)
honkit/honkit
Jun 2020 - Jun 2020
:book: HonKit is building beautiful books using Markdown - Fork of GitBook
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:13 commits, 3 PRs, 3 comments in 1 day
Contributions summary:Koutaro primarily focused on refactoring and rewriting tests within the HonKit repository, specifically targeting the `githon` package. These changes involved migrating tests to TypeScript, indicating a shift towards a more modern and type-safe development approach. Furthermore, the user updated several test files across various modules like `summaryArticle`, `parseBook`, and `website.js`, ensuring code quality and maintainability. The user also addressed build issues, suggesting involvement in the project's overall stability.
ebooknoteshonkitjavascriptplugin
mizchi-sandbox/grid-generator
Dec 2017 - Dec 2017
Contributions:51 commits, 28 pushes, 2 branches in 11 days
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