Yuji Yaginuma
Technical Lead at ANDPAD
Saitama Prefecture, Japan
Summary
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Rockstar🎓
Top School
Top expert inRuby on Rails Development Ecosystem
Yuji Yaginuma is a Technical Lead and seasoned backend engineer with 13 years of professional experience, specializing in Ruby on Rails and web services since 2008. He has launched multiple services at venture companies and freelanced on medical and EC platforms, covering feature development, architecture design, performance tuning, and library migrations. A pragmatic engineer who also maintains and authors libraries, he contributes fixes and tests to high-profile open-source projects including Rails, Ruby core, and Protocol Buffers, improving compatibility, security, and build/test infrastructure. Comfortable with AWS-based infrastructure and front-end stacks like Vue.js/React, he recently served as the sole backend engineer for a new product while mentoring cross-functional teams. Notably, he proactively patches third-party libraries and creates tooling (including a Windows CLI in Go), reflecting a bias for durable, production-ready solutions. Based in Saitama, Japan, he combines deep Rails expertise with practical devops and QA experience to ship reliable systems.
13 years of coding experience
16 years of employment as a software developer
Computer Science, Computer Science at 日本大学
Github Skills (33)
ruby-rails10
programming-language10
maintenance10
back-end-development10
protocol-buffers10
rubygems10
testing10
rspec10
rails10
decorator10
ruby10
decorators10
lang10
build-automation10
code-cleanup10
Programming languages (20)
Github contributions (5)
rails/rails
Jan 2015 - May 2020
Ruby on Rails
Role in this project:
Back-end Developer
Back-end DeveloperContributions:3 reviews, 1116 commits, 964 PRs in 5 years 4 months
Contributions summary:Yuji primarily contributed to the Rails framework, focusing on bug fixes and improvements to the testing infrastructure. Their work involved resolving issues in the test runner, addressing documentation errors, and fixing path generation in generators. They also addressed code warnings, such as those related to deprecated methods and uninitialized variables. The contributions demonstrate a focus on the core functionality and maintenance of the Rails framework.
ruby-on-railsrailsframeworkrubymvc
activerecord-hackery/ransack
Sep 2016 - May 2022
Object-based searching.
Role in this project:Back-end Developer
Back-end DeveloperContributions:10 commits, 9 PRs, 6 comments in 5 years 9 months
Contributions summary:Yuji primarily focused on adapting the Ransack gem to work with different versions of Rails and ActiveRecord. Their contributions involved fixing compatibility issues related to alias tracking and join dependencies in newer Rails versions (5.2.1). They also modified the gem to define a specific constant in the mongoid adapter and removed a deprecated method. These changes demonstrate a focus on maintaining and extending the gem's compatibility across different Rails environments and database systems.
ruby-on-railsruby-gemrailssqlsearch-interface
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