Ryosuke Hasebe
ゼネラルマネージャー 開発 at LINEヤフー株式会社
Chiyoda, Japan
Summary
🤩
Rockstar🎓
Top SchoolRyosuke Hasebe is a seasoned software engineering leader with 12 years of experience building and scaling backend systems, now serving as General Manager of Development at LINEヤフー. He rose through technical and managerial ranks at LINE—contributing to core products like LINE Messaging API, LINE Login, and game/platform infrastructure—and has been recognized with LINE Developer Awards. Hands-on in Java and Kotlin and an active open-source contributor, he has improved the popular line-bot-sdk-python by refactoring HTTP clients, tightening webhook validation, and enhancing documentation. His background blends deep server-side engineering with people leadership, having held principal architect and senior engineering manager roles. Based in Chiyoda, Tokyo, he holds a master's in computer science from Keio University and is known for prioritizing maintainability and developer ergonomics in large-scale systems. An oft-overlooked strength is his track record of moving between individual contributor and executive roles while still shipping production-grade SDK and API improvements.
13 years of coding experience
10 years of employment as a software developer
Master's degree, Computer Science, Master's degree, Computer Science at Keio University
Github Skills (9)
python10
api-design10
newline9
documentation9
comand-line9
sdk9
linebreak9
bots8
googlebot8
Programming languages (13)
Github contributions (5)
line/line-bot-sdk-python
Oct 2016 - Jun 2019
LINE Messaging API SDK for Python
Role in this project:
Backend Developer
Backend DeveloperContributions:13 releases, 85 commits, 86 PRs in 2 years 8 months
Contributions summary:Ryosuke focused on refactoring the HTTP client and moving the `SignatureValidator` to the webhook module. They also wrote documentation, indicating a focus on code maintainability and usability. Additionally, they modified event models and updated webhook parsing and handling, suggesting involvement in core API functionality and request processing within the Python SDK. This user's changes centered around improvements to the SDK's internal workings and documentation.
messaging-apipythonbotsdklinebot
be-hase/kuery-client
Jun 2024 - Jul 2026
A Kotlin/JVM database client for those who want to write SQL
Contributions:15 releases, 15 reviews, 101 PRs in 2 years 1 month
databasejvmkotlinsqldatabase-client
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