Yohei Yamaguchi
Software Engineering Manager at GMO Financial Holdings, Inc.
Canada
Summary
👤
Senior🎓
Top SchoolYohei Yamaguchi is a Software Engineering Manager with 13 years of experience leading backend-focused teams and currently managing 10 engineers at GMO-Z.COM Fintech CA, building secure, scalable crypto trading and B2B wallet systems. He blends deep hands-on backend expertise (Java, Kotlin, Node.js) with experience in iOS and frontend, and is a strong advocate of clean architecture, domain-driven design, and pragmatic agile practices. Yohei routinely serves as the technical face to clients—clarifying requirements, guiding specs, and resolving production incidents with composure—helping bridge product needs and engineering delivery. His background spans startups and large enterprises (including Yahoo! JAPAN and Recruit Lifestyle), with a track record of shipping multi-currency crypto servers and refactoring legacy systems at scale. Trained in natural language processing from Kyoto University, he brings analytical rigor to system design and a knack for growing resilient, customer-aligned teams.
13 years of coding experience
11 years of employment as a software developer
Master's degree Natural Language Processing Speech Recognition, Master's degree Natural Language Processing Speech Recognition at Kyoto University
Japanese, English
Github Skills (84)
cryptocurrency10
p2p10
staging10
bitcoin10
cryptography10
bitcoin-core9
fabric9
tron9
reference-implementation9
blockchain9
ethereum9
jasypt9
openid9
stellar9
golang8
Programming languages (12)
Github contributions (5)
gologo13/passport-rakuten
Feb 2013 - Nov 2014
Contributions:10 commits in 1 year 9 months
PhysicsEngine/SoundLine-app
Aug 2015 - Aug 2015
Contributions:22 commits, 18 pushes, 1 branch in 1 day
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