Shintaro Kakutani
Fellow at Eiwa System Management Inc.
Tokyo, Japan
Summary
👤
Senior🎓
Top SchoolShintaro Kakutani is a seasoned software leader and Fellow with 18 years of experience driving Ruby and Rails projects and coaching agile transformations across Japan. Based in Tokyo, he combines hands-on backend skills in Ruby, Java and JavaScript with deep expertise in Agile methodologies, helping teams scale from small startups to large B2B and EC services. He has a long history at Eiwa System Management and as a freelance Agile Coach, guiding migrations, product rebuilds, and organizational adoption of Scrum over multi-month to multi-year engagements. An active open-source contributor, Shintaro localized the widely used Cucumber Ruby project for Japanese users and helped harden the Ruby spec suite across versions—work that highlights his focus on internationalization and cross-version compatibility. He also directs community efforts through Ruby-no-kai, blending technical stewardship with community leadership. Outside work he’s a self-described “keeb zombie,” hinting at a meticulous, hands-on curiosity that he brings to both code and team processes.
17 years of coding experience
10 years of employment as a software developer
法学部法学科, 法学部法学科 at Ritsumeikan University
Stackoverflow
183reputation
2kreached
3answers
0questions
Github Skills (14)
cucumber10
internationalization10
localization10
test-driven-design10
rubyspec10
ruby10
spec9
mspec8
utf6
nokogiri6
character-encoding6
rmagick6
hash6
encoding6
Programming languages (8)
Github contributions (5)
cucumber/cucumber-ruby
Oct 2008 - Oct 2009
Cucumber for Ruby. It's amazing!
Role in this project:
Localization / Internationalization Specialist
Localization / Internationalization SpecialistContributions:17 commits in 1 year
Contributions summary:Shintaro's contributions primarily focus on adding Japanese language support to the Cucumber-Ruby project. They modified the parser to handle Japanese characters and created a Japanese calculator example within the `examples/i18n/ja` directory. These changes demonstrate a specific effort to adapt the framework for international users. The user also updated existing examples to ensure compatibility with the new Japanese language features. The commits consistently show a focus on adapting existing tools and frameworks to support the Japanese language.
cucumberrubyamazingpolyglot-releasetidelift
ruby/spec
Sep 2009 - Dec 2009
The Ruby Spec Suite aka ruby/spec
Role in this project:Back-end Developer
Back-end DeveloperContributions:5 commits in 2 months
Contributions summary:Vladimir Sizikov primarily worked on bug fixes and adapting the Ruby spec suite for compatibility across different Ruby versions, especially versions 1.8.x. His commits focused on resolving issues related to `UnboundMethod#name`, `IO#binmode`, `__FILE__`, and `Binding#eval`. He also addressed encoding issues with `File.to_path`, ensuring correct behavior across different Ruby implementations.
ruby-gemmspecrailsrubyspec
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.