Shinichi Maeshima
代表取締役社長 at 株式会社ウィルネット
Chiyoda, Japan
Summary
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Rockstar🎓
Top SchoolShinichi Maeshima is a Tokyo-based technology founder and Ruby on Rails specialist with 15 years of experience building web services and leading engineering teams. As CEO of 株式会社ウィルネット since 2017 and a former freelance/web engineer, he combines hands-on backend development with product leadership. He contributes to the core Rails codebase—improving ActiveSupport threading behavior and modernizing assets—which shows a focus on robustness and developer ergonomics. An organizer of ginza.rb, he plays an active role in Japan’s Rails community and advises companies on practical Rails adoption. His background includes enterprise project management at Fujitsu and a master’s in Information Technology from Waseda University, blending academic rigor with real-world delivery.
15 years of coding experience
11 years of employment as a software developer
master, Information Technology, master, Information Technology at Waseda University
Chinese, Japanese
Stackoverflow
451reputation
8kreached
2answers
1question
Github Skills (14)
ruby-rails10
activesupport10
rails10
ruby10
testing9
documentation8
application-framework7
web-framework7
app-framework7
minitest6
docker6
capybara6
integration-testing6
ruby-on-rails6
Programming languages (11)
Github contributions (5)
rails/rails
May 2016 - Jun 2022
Ruby on Rails
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 review, 20 commits, 26 PRs in 6 years 2 months
Contributions summary:Shinichi primarily focused on improving the `thread_mattr_accessor` functionality within the ActiveSupport library to correctly handle inheritance and thread-local variables. They also made several small bug fixes and improvements, including replacing `jquery-ujs` with `rails-ujs` and fixing typos. Furthermore, the user contributed to documentation by enabling links in RDoc and correcting errors in sample code, demonstrating a commitment to code quality and usability. These changes reflect a focus on maintaining and improving the core Rails framework.
ruby-on-railsrailsframeworkrubymvc
willnet/willnet_in
Jul 2015 - Mar 2025
Contributions:23 reviews, 95 PRs, 95 pushes in 9 years 9 months
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