Yukio G
マネージャー at フリー株式会社
Chiyoda, Japan
Summary
👤
Senior🎓
Top SchoolYukio G is a seasoned software engineer and architect with 15–16 years of experience designing web and mobile services, REST APIs, and client applications using languages from Ruby and Java to C/C++ and Lisp. He has led engineering teams at Rakuten and Enigmo, managing email/direct marketing and affiliate platforms while driving process improvements, CI, and test-driven development. A committed Rubyist and open-source contributor, he is a ROMA committer and creator of Ruby libraries, with hands-on experience across Rails, Sinatra, Spring, Hadoop, Redis/Memcached, and multiple RDBMS. Based in Chiyoda, Japan, he pairs deep technical craft with people leadership—often bridging offshore teams and product goals—and has supplemented his background with Stanford machine learning coursework. An unexpected but valuable strength is his cross-domain foundation from chemical technology to ML, which helps him approach engineering problems with an analytical, systems-oriented mindset.
16 years of coding experience
15 years of employment as a software developer
Chemical Technology/Technician, Chemical Technology/Technician at 横浜国立大学 / Yokohama National UniversityMachine Learning cource, Machine Learning cource at Stanford University
English, Japanese
Github Skills (83)
jsx10
markdown10
javascript10
yaml10
html10
input-method10
angular10
json10
typescript10
eslint10
magit10
vue10
ime10
css10
printer10
Programming languages (14)
Github contributions (5)
byplayer/chef-devenv
Jan 2015 - Jun 2020
Contributions:12 pushes, 1 branch in 5 years 6 months
byplayer/Clipy
Jan 2023 - May 2026
Clipboard extension app for macOS.
Contributions:6 PRs, 13 pushes, 20 branches in 3 years 4 months
macosapp-extensionclipboard
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.