Katsuya Yamada
プロダクトマネージャー 新規事業開発 at 株式会社スピークバディ (SpeakBUDDY Ltd.)
Soka, Japan
Summary
👤
Senior🎓
Top SchoolKatsuya Yamada is a product manager and new business developer with eight years’ experience building AI-driven English learning services and leading large-scale web projects. At SpeakBuddy he has taken ideas from hypothesis and PoC through Figma/Next.js prototyping, user interviews, and MVP launches, focusing on high-quality user personas and AI integration to boost UX. He previously managed teams of up to 30 people and ~¥150M budgets at NetYear Group, owning projects end-to-end from proposals to post-launch analytics across AWS, custom CMS, and Laravel stacks. Comfortable facilitating multilingual teams with business-level English, he blends hands-on prototyping skills with data-driven site optimization and A/B testing. An early mobile contributor, he’s fixed UI/animation bugs in a popular Android card-swipe library, showing attention to detail across product and code. This mix of practical engineering fixes, UX-first product design, and large-project delivery makes him effective at turning complex web and AI ideas into usable services.
8 years of coding experience
5 years of employment as a software developer
政治経済学部, 政治経済学部 at 明治大学
Github Skills (7)
javas10
recyclerview10
android-recyclerview10
animation10
android10
java10
ui-design9
Programming languages (1)
Github contributions (3)
yuyakaido/CardStackView
Mar 2018 - Feb 2019
📱Tinder like swipeable card view for Android
Role in this project:
Mobile Developer (Android)
Mobile Developer (Android)Contributions:7 commits, 6 PRs, 5 comments in 11 months
Contributions summary:Katsuya primarily contributed to the Android card stack view library, focusing on UI improvements and bug fixes related to card animations and overlays. Their work involved modifying the `CardContainerView`, `CardStackView`, and `MainActivity` to enhance the visual effects of card swiping, including alpha animations for overlays. The user addressed a bug where overlays weren't working during swipes and updated the sample application. They also fixed a `NullPointerException` within the `CardStackLayoutManager`.
tinder-likerecyclerviewcard-viewswipe-gesturesandroid-library
katsuya-yamada-eureka/CardStackView
Mar 2018 - Mar 2018
Contributions:1 push, 2 branches in 1 day
tinder-likecard-viewandroid-libraryandroidtinder
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