Yuan-hsiang Cheng
Senior Software Engineer at Rakuten
Greater Tokyo Area Japan
Summary
🤩
Rockstar🎓
Top SchoolYuan-hsiang Cheng is a Senior Software Engineer based in the Greater Tokyo Area with 12 years of experience building high-performance, full-stack systems using Go, Rust, JavaScript and functional languages. He currently maintains authentication and authorization services at Rakuten and has a strong background designing trading and real-time systems—having implemented WebSocket architectures, FIX integrations, and GraphQL mobile backends for fintech platforms. Equally comfortable on frontend and backend, he has contributed to notable open-source front-end tooling (hackfoldr) and introduced languages and practices like Elm, ReasonML and OIDC into production teams. Known for shipping fast, pragmatic solutions—such as a one-month React Native mobile release and performance-focused messaging layers—he blends systems thinking with hands-on implementation. He is selective about opportunities and targets senior roles at the JPY 12M+ level.
12 years of coding experience
9 years of employment as a software developer
Bachelor of Engineering (B.E.), Computer Science, Bachelor of Engineering (B.E.), Computer Science at National Chiao Tung UniversityMaster of Science (M.S.), Computer Science, Master of Science (M.S.), Computer Science at National Chengchi University
English, Chinese, Japanese
Github Skills (10)
responsive-design10
javascript10
user-interface10
graphical-user-interface10
angularjs10
human-interface10
html9
css8
ui-design8
sass7
Programming languages (16)
Github contributions (5)
hackfoldr/hackfoldr
Aug 2013 - Sep 2015
organize gdoc and hackpad for hackathons
Role in this project:
Front-end Developer
Front-end DeveloperContributions:29 commits, 1 push in 2 years 1 month
Contributions summary:Yuan-hsiang primarily contributed to the front-end development of the hackfoldr repository. Their work involved modifying the user interface, including responsive design adjustments, and implementing features such as fast-click for improved user interaction. They also updated the user interface with the new g0v logo and refined components for better usability. Additionally, the user addressed responsive issues and removed external JavaScript files.
organizehackpad
yhsiang/language-livescript
Feb 2014 - Mar 2015
Contributions:6 commits, 1 PR, 1 push in 1 year
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