Yohei Sato
代表取締役CEO at 株式会社portia
Chiyoda, Japan
Summary
🤩
RockstarYohei Sato is the founder and CEO of Portia Inc., leading a multicultural engineering team to build B2B-focused payment, e-commerce, and image-processing AI services from Tokyo. With eight years of hands-on web application experience, he combines full-stack development (Node.js, React) with product-led customer engagement, often working directly with clients on sales, marketing, and technical delivery. He contributes to open-source projects like GROWI, improving test coverage and maintainability across front- and back-end codebases, reflecting a practical emphasis on quality and performance. Comfortable hiring and managing international talent, he actively recruits engineers from Japan, Bangladesh, and Vietnam and can offer local permanent contracts. Ambitious about expanding into mobile and broader platforms, he balances entrepreneurship with a developer’s attention to architecture and testability.
7 years of coding experience
Github Skills (13)
javascript10
typescript-types9
react9
backend9
front-end-development9
back-end-development9
typescript9
typescripts9
nodejs9
testing8
mongodb-database8
mongodb8
git7
Programming languages (8)
Github contributions (5)
weseek/growi
Oct 2021 - Nov 2022
:anchor: GROWI - Team collaboration software using markdown
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:695 reviews, 2211 commits, 435 PRs in 1 year 1 month
Contributions summary:Yohei's commits primarily focused on improving the test coverage and functionality of the Growi application. The code changes involved merging branches, improving test code, and adding comments. The commits also included updates to the front-end and back-end logic, involving file modifications related to routes and models. The user also made efforts to enhance the performance and maintainability of the code base.
team-collaborationreactgrowiwiki-enginejavascript
Yohei-Shiina/chat-awesome
Sep 2022 - Oct 2022
Contributions:5 reviews, 60 commits, 23 PRs in 6 days
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.