Resume
Experience
Jan 2025 - Present
DeNA Co., Ltd.
Backend platform development
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Develop and operate a shared mobile game platform using Ruby on Rails and C++
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Develop APIs, design databases, and migrate legacy components
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Update the C++ SDK protocol and develop middleware
May 2024 - Dec 2024
DeNA Co., Ltd.
Lead engineer, new mobile game development
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Designed the architecture and selected technologies for a large-scale Unity game for Android and iOS
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Coordinated stakeholder communication and work assignments with multiple partner companies
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Designed the client's foundation using 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 native C++ plugins
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Developed the server using Go and managed services on GCP
Sep 2022 - Sep 2023
DeNA Co., Ltd.
Lead engineer, PC and WebGL game development
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Designed and developed a client for macOS, Windows, and WebGL
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Developed the server using PlayFab and Azure Functions (C#)
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Built CI/CD workflows and a Steam deployment pipeline with GitHub Actions
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Handled tasks outside engineering, including GDPR compliance and Steam developer registration
Mar 2022 - Aug 2022
DeNA Co., Ltd.
Lead engineer, WebGL game development
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Developed a casual game for fingger, a live gaming platform
Apr 2019 - Mar 2022
DeNA Co., Ltd.
Lead engineer, live mobile game operations
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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, including real-time PvP, UI, and animation
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Developed the server using Ruby on Rails, including GvG grouping and a chat API
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Built CI/CD pipelines 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 client for Android and iOS
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Developed the server and admin panel features using NestJS and Next.js
Web3 mobile game development
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Developed the Unity client for Android and iOS
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Helped design the architecture and reviewed code
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Developed in-app purchase (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
Skills
Programming languages
Frontend
Backend
Cloud and infrastructure
DevOps