Tokuhiro Matsuno
Software Engineer at Sakura Internet Inc
Chiyoda, Japan
Summary
🤩
Rockstar🎓
Top SchoolTokuhiro Matsuno is a seasoned software engineer with 20 years of experience building backend systems, server architectures, and web applications across Java, Kotlin, Rust, Python and legacy C/C++/Perl codebases. He has held senior technical and leadership roles at LINE—rising to Engineering Fellow and Deputy Director—and now contributes at Sakura Internet, bringing product-facing engineering experience from services like LINE Customer Connect, LINE Notify, and LINE Taxi. A pragmatic polyglot, he combines hands-on SDK and protocol work (contributions across Java, Python, and Go LINE SDKs) with low-level systems contributions such as MessagePack and picohttpparser. His open-source history shows a knack for bridging language ecosystems (adding Perl support to MessagePack, adding HTTP parsing and response handling), reflecting deep attention to interoperability and performance. Based in Chiyoda, Japan, he pairs large-scale platform leadership with continued craftsmanship in tooling and developer-facing APIs.
20 years of coding experience
18 years of employment as a software developer
Information technology Electronics, Information technology Electronics at Tokyo Metropolitan College of technology
English, Japanese
Stackoverflow
80reputation
3kreached
2answers
4questions
Github Skills (54)
lib10
back-end-development10
python10
apidoc10
api-design10
testing10
http10
code-library10
c1110
perl10
psgi10
java10
c1710
javas10
go10
Programming languages (27)
Github contributions (5)
line/line-bot-sdk-java
Apr 2016 - Dec 2022
LINE Messaging API SDK for Java
Role in this project:
Back-end Developer
Back-end DeveloperContributions:20 releases, 158 reviews, 350 commits in 6 years 8 months
Contributions summary:Tokuhiro primarily contributed to the Java-based SDK by addressing code issues, improving method argument types, and implementing features. They fixed errors in the `DefaultLineBotClient.java` file and updated method signatures for greater flexibility. Furthermore, the user added a functionality by implementing the validation of messages, suggesting a focus on API functionality and data integrity.
apiapi-sdkbotline-messaging-apisdk
line/line-bot-sdk-python
Mar 2019 - Mar 2022
LINE Messaging API SDK for Python
Role in this project:Back-end Developer
Back-end DeveloperContributions:48 reviews, 12 commits, 37 PRs in 3 years
Contributions summary:Tokuhiro primarily contributed to the development and enhancement of the LINE Messaging API SDK for Python. Their commits focused on improving error messages, adding sample code for image sending, and supporting new events, such as memberJoined and memberLeft, demonstrating a focus on expanding the SDK's functionality and handling various messaging scenarios. The user also updated the codebase to support enhanced messaging API features.
apipythonapi-sdkbotline-messaging-api
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