Yohei Yasukawa is a founder and executive with 14 years’ experience building Ruby on Rails products, open-source projects, and education programs from Japan. As CEO of YassLab he runs a 100% remote company that develops RailsTutorial and RailsGuides, and he also co-founded CoderDojo Japan and serves as its Executive Director, merging product leadership with grassroots tech education. He contributes to prominent community projects—implementing practical features like README parsers and data pipelines for remote job listings—and has driven continuous translation and curriculum design for web-development learners. A recognized speaker and awardee (TEDxRyukyu, MITOH Super Creator, Fukuoka Ruby Awards), he blends hands-on back-end work with program management for youth-focused innovation at the Mitou Foundation. Colleagues describe him as a builder who turns tutorial content into production-ready sample apps while scaling community learning initiatives across Japan.
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.
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.