Yoshiaki Tsutsumi
Co-founder CEO at byus&co.
Yokosuka, Kanagawa Prefecture, Japan
Summary
👤
SeniorYoshiaki Tsutsumi is a seasoned entrepreneur and full-stack software engineer with 11 years building and leading byus&co. as co-founder and CEO from Yokosuka, Japan. He combines hands-on expertise in Next.js, TypeScript, Node.js, GraphQL, React (Native), PostgreSQL and Ruby on Rails with practical experience in CI/CD and Agile delivery, enabling fast, reliable product iterations. Comfortable in both English and Japanese, he navigates cross-cultural teams and venture financing while keeping a developer’s focus on shipping quality code. His curiosity for emerging tech—cryptocurrency, web3 and AI—complements a strong open-source mindset, reflected in a personal brand that blends engineering rigor with entrepreneurial punk spirit.
11 years of coding experience
Japanese, English
Stackoverflow
650reputation
87kreached
28answers
1question
Github Skills (200)
mobile-development10
ui-components10
redux-persist10
material-ui10
microfrontend10
mapview10
google-maps10
framework710
javascript10
react-components10
mbaas10
app-framework10
keyboard10
input-field10
maps10
Programming languages (12)
Github contributions (5)
foloinfo/react-native-tag-input
Mar 2020 - May 2023
A simple React Native component that creates an input for tags, emails, etc.
Contributions:2 releases, 1 review, 2 PRs in 3 years 2 months
reactreact-nativereact-native-componentemailshead
foloinfo/pesdk-react-native
Mar 2022 - Jun 2024
React Native module for PhotoEditor SDK
Contributions:1 release, 8 PRs, 34 pushes in 2 years 3 months
reactreact-native-modulereact-nativeandroidsdk
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