Resume
Experience
Jan 2025 - Present
DeNA Co., Ltd.
Backend Platform Development
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Operate and develop a shared platform for mobile games (Ruby on Rails / C++)
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Develop APIs, design databases, and migrate legacy components
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Modify the protocol of the C++ SDK and develop middleware
May 2024 - Dec 2024
DeNA Co., Ltd.
New Mobile Game Development — Lead Engineer
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Designed the architecture and selected technologies for a large-scale Unity (Android / iOS) title
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Coordinated stakeholder communication and work assignments with multiple partner companies
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Designed a client foundation based on Clean Architecture and tuned performance
Sep 2023 - May 2024
DeNA Co., Ltd.
New Service Development
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Developed a Unity client (Clean Architecture) and C++ native plugins
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Developed the server with Go and GCP managed services
Sep 2022 - Sep 2023
DeNA Co., Ltd.
PC / WebGL Game Development — Lead Engineer
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Designed and developed a multi-platform client (macOS / Windows / WebGL)
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Developed the server with PlayFab and Azure Functions (C#)
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Built CI/CD and a Steam deployment pipeline with GitHub Actions
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Covered non-engineering areas, for example GDPR compliance and Steam developer registration
Mar 2022 - Aug 2022
DeNA Co., Ltd.
WebGL Game Development — Lead Engineer
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Developed a casual game for the live gaming platform (fingger)
Apr 2019 - Mar 2022
DeNA Co., Ltd.
Live Mobile Game Operations — Lead Engineer
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Managed a team of 10 engineers and prepared development plans
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Developed all areas of the Unity client (real-time PvP, UI / Animation)
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Developed the server with Ruby on Rails (GvG grouping, chat API, and more)
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Built CI/CD with Jenkins and upgraded Unity across major versions
Freelance
Financial Web Platform Development
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A web platform that combines multiple consumer financial services
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Developed the backend and admin panel features with Ruby on Rails
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MySQL / Redis / Sidekiq / AWS
AI Character Chat App Development
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Developed the Unity (Android / iOS) client
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Developed the server and admin panel features (NestJS / Next.js)
Web3 Mobile Game Development
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Developed the Unity (Android / iOS) client
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Helped design the architecture and reviewed code
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Developed IAP, gacha, and other systems, and built the AssetBundle build pipeline
Education
Master of Science (Planetary Atmospheric Science)
Graduate School of Natural Science and Technology, Okayama University
2017 - 2019
Technical Skills
Programming Languages
Frontend
Backend
Cloud / Infrastructure
DevOps