Koji Wakamiya
ソフトウェアエンジニア at Recruit Co.,Ltd.
Saitama, Japan
Summary
👤
Senior🎓
Top SchoolKoji Wakamiya is a mobile software engineer based in Saitama with 10 years of experience building Android and iOS apps that prioritize low crash rates, small binary size, and maintainability. He has led design and development across six products at Studyplus and currently develops software at Recruit, bringing practical cross-platform experience (native and Flutter). Koji is an active open-source contributor, notably to the Flutter framework and DroidKaigi conference apps, where he improved UI/UX transitions and implemented robust data layers using SQLDelight. His work on migrating Flutter plugins to web via dart:js_interop shows a knack for platform interoperability beyond typical mobile concerns. Trained in engineering and management at the University of Tsukuba, he combines technical depth with product-focused thinking. Peers describe him as someone who quietly reduces technical debt while improving user experience.
10 years of coding experience
修士, 経営工学, 修士, 経営工学 at 筑波大学
Stackoverflow
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Github Skills (25)
kotlin10
ios10
flutter-apps10
ui-design10
uid10
front-end-development10
android10
sqldelight10
transition10
android-ui10
jetpack-compose10
flutter-game10
web-development10
dart10
flutter10
Programming languages (14)
Github contributions (5)
DroidKaigi/conference-app-2021
Sep 2021 - Oct 2021
The Official App for DroidKaigi 2021
Role in this project:
Mobile Developer (Android)
Mobile Developer (Android)Contributions:13 reviews, 42 commits, 5 PRs in 29 days
Contributions summary:Koji primarily contributed to the development of the Android application for the DroidKaigi 2021 conference. Their work focused on implementing and maintaining the data layer, including the creation of a database using SQLDelight for storing timetable information. Furthermore, they added a fake implementation of the data access object (DAO) and the repository. The contributions encompass modifications to both the data and the UI components, particularly in the detail screens for the timetable.
jetpack-composejetpack-androidkotlin-multiplatformandroiddroidkaigi
DroidKaigi/conference-app-2020
Jan 2020 - Mar 2020
The Official Conference App for DroidKaigi 2020 Tokyo
Role in this project:Mobile Developer (Android)
Mobile Developer (Android)Contributions:13 commits, 4 PRs, 23 comments in 1 month
Contributions summary:Koji primarily focused on enhancing the Android application's user interface by implementing animations and transitions. Their work included adding a stagger effect to the contributors and staff list and implementing a fade-through transition for the session detail view. These changes suggest a focus on improving the visual experience and user flow within the DroidKaigi conference app.
androiddroidkaigikotliniosflutter
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