Yohei Yasukawa is an executive director and founder with 14 years of experience building Ruby/Rails products, developer education, and open-source communities from Chiyoda, Tokyo. He leads YassLab, a distributed remote-first company that develops railstutorial.jp and railsguides.jp, and co-founded the Japanese Rails Tutorial/Guides and CoderDojo Japan. A hands-on full‑stack contributor, he has implemented automation like a README parser and data generation for remote job listings and built a continuous translation system to keep learning resources in sync. As a TEDx speaker and award-winning community builder, he combines product leadership, project-based learning design (Visual Bucket List), and youth-focused program management at the Mitou Foundation. His background in OS research and steady open-source committer work give him both technical depth and a strong community-first approach.
14 years of coding experience
1 year of employment as a software developer
Master, Computer Science, Master, Computer Science at Waseda University
Exchange Student, Design, Communication, Computer Science, Exchange Student, Design, Communication, Computer Science at Monmouth College
Contributions:143 commits, 48 PRs, 110 pushes in 7 years 11 months
Contributions summary:Yohei's commits indicate involvement in a Rails application focused on Rails tutorials. The user added code from chapters 4 through 11, and a sample application. This implies the user was adding or updating the code examples for specific lessons within the tutorial. The commits primarily involve modifications to configuration files, models, and request specifications, showcasing the user's work in building a sample Rails app.
Contributions:2 reviews, 380 commits, 236 PRs in 7 years 4 months
Contributions summary:Yohei primarily worked on building out the front-end and back-end infrastructure for a remote job listing site. They implemented a README parser to extract company data, developed a script to generate data from the README, and created individual company pages. Their contributions involved modifying the layout and content of the site, and adding features like a back button and Google Analytics integration. They also updated the site to use relative URLs and HTTPS for improved functionality.
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Yohei Yasukawa - Executive Director at CoderDojo Japan Association