Yudai Tokunaga
Application Developer
Japan
Summary
🤩
Rockstar🎓
Top SchoolYudai Tokunaga is an application developer with a decade of experience designing, testing, and delivering banking and payment systems across major Japanese financial institutions. He has progressed from system testing roles to hands-on basic design and component/unit testing on projects including ATM, mobile payments, internet banking replacements, AML packages, and paperless initiatives. Comfortable across Java, JSP, TypeScript, C, Swagger and frameworks like Spring and Angular, he pairs frontend and middleware experience with DB2/Oracle expertise and container tooling such as Docker. Yudai has worked within large enterprise toolchains (Git/GitHub, Subversion, RTC, Redmine) and consistently operates in regulated, audit-focused environments where reliability and traceability matter. Although his GitHub presence is modest, he brings practical Ruby skills and a pragmatic engineering mindset honed at IBM Japan and The Japan Research Institute. Based in Japan, he blends steady delivery experience with an appetite for cross-stack problem solving in financial systems.
10 years of coding experience
7 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Nippon Institute of Technology
Github Skills (9)
ruby9
mvc9
rails9
refactoring9
html9
activerecord8
react8
ruby-on-rails8
react-components7
Programming languages (7)
Github contributions (5)
ytnk531/rails_training
Jan 2019 - Sep 2020
railsの練習
Contributions:14 PRs, 33 pushes, 6 branches in 1 year 8 months
ruby-on-railsrailsruby
ytnk531/react-tutor
Jun 2018 - Nov 2021
Contributions:6 pushes, 1 branch in 3 years 5 months
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