Hideyo Isaji
Software Developer at Fitness International LLC
Irvine, California, United States
Summary
👤
Senior🎓
Top SchoolHideyo Isaji is a seasoned software developer with a Master's in Computer Science and over 15 years of full-stack experience building desktop, web, and mobile applications using C#, .NET, Java, cloud services, and relational databases. Based in Irvine, CA, he has delivered mission-driven solutions for law enforcement—designing forensic and AI-assisted sketching tools that integrate OAuth2, cloud data extraction, and Stable Diffusion image APIs—and improved data parsing efficiency by 50% through systematic upgrades. He has led offshore teams, mentored junior engineers, and repeatedly bridged desktop (WPF, MVVM) and modern cross-platform stacks (.NET MAUI, Blazor) to meet demanding field and enterprise use cases. An active open-source contributor, Hideyo has extended the popular Japanese TRPG dice engine BCDice by adding and refining game-system dice logic, showing both attention to niche communities and solid backend skills. Comfortable across the stack, he combines pragmatic engineering, security-aware integrations, and continuous learning to turn complex requirements into reliable, deployable software.
10 years of coding experience
6 years of employment as a software developer
Master's degree, Computer Science, Master's degree, Computer Science at California State University-Los AngelesBachelor's degree, Electrical and Electronics Engineering, Bachelor's degree, Electrical and Electronics Engineering at Tokyo University of Science
English, Japanese
Github Skills (2)
ruby10
regular-expression8
Programming languages (9)
Github contributions (5)
bcdice/BCDice
May 2020 - Jan 2023
The most popular TRPG dice command engine in Japan
Role in this project:
Back-end Developer
Back-end DeveloperContributions:4 reviews, 61 commits, 34 PRs in 2 years 8 months
Contributions summary:Hideyo primarily contributed to adding and modifying dice bots for the "サンサーラ・バラッド" game system within the "bcdice/bcdice" repository. These changes involved implementing dice roll logic, including normal and swap rolls, and handling conditional checks. The user also made modifications to existing game system files, added new game systems, and fixed a series of typos, demonstrating a focus on expanding the engine's support for different TRPG systems.
dice-rollergamerpgtrpgdice
h-mikisato/udonarium_lily
Dec 2020 - Dec 2022
WebRTCを使ってブラウザ間通信を行うオンセツール ユドナリウムの変更版ユドナリウムリリィです
Contributions:40 pushes, 60 branches in 2 years
webrtc
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