Yoshimasa Wakahara
ソフトウェアエンジニア at 合同会社匠のあそび
Tokyo, Japan
Summary
👤
Senior🎓
Top SchoolYoshimasa Wakahara is a Tokyo-based software engineer with 14 years of experience building web and mobile applications and leading product development. He spent a decade at freee株式会社 progressing from engineer to executive head of product development, blending hands-on coding with strategic leadership. An author of multiple technical articles and booklets on front-end development and AngularJS, he brings deep expertise in JavaScript ecosystems and large-scale front-end architecture. His open-source contributions include adding precise type signatures to Ruby’s standard library date/datetime modules, reflecting attention to developer ergonomics and correctness across language boundaries. Now at 合同会社匠のあそび, he continues to combine practical engineering with product thinking, often translating complex domain needs into robust developer-friendly APIs.
14 years of coding experience
上智大
Github Skills (3)
type-check10
type-checking10
ruby10
Programming languages (6)
Github contributions (5)
ruby/rbs
Aug 2020 - Aug 2020
Type Signature for Ruby
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 review, 8 commits, 1 PR in 4 days
Contributions summary:Yoshimasa's contributions primarily involve adding type signatures for the Ruby standard library's `date` and `datetime` modules. This work focuses on defining the types for classes, methods, and related elements within these core Ruby date and time functionalities. The user meticulously defined the types, including methods like `new`, `parse`, and others, providing comprehensive type information for the specified libraries. The commits also included adjustments to the `date` and `datetime` classes, potentially addressing issues.
railssignaturerubytype-checking
waka/dotfiles
Nov 2011 - Oct 2022
Contributions:78 commits, 4 PRs, 36 pushes in 11 years 1 month
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