Yusuke S
Site Reliability Engineer at LegalOn Technologies
Chiyoda, Japan
Summary
🤩
Rockstar🎓
Top SchoolYusuke S is a Site Reliability Engineer with a decade of experience building and operating high-throughput, low-latency systems for Japanese internet companies, currently driving reliability at LegalOn Technologies. He previously optimized backend services at AbemaTV and developed data and ad-platform infrastructure at VOYAGE GROUP that handled monthly traffic on the order of billions of impressions. Comfortable across backend, data engineering, and full-stack work, he combines production-grade engineering with test-driven contributions to open-source projects. Notable OSS work includes improving NumSharp’s NumPy IO compatibility, enabling OpenCVSharp on WebAssembly for Blazor, and hardening ElasticMQ’s SQS behavior—demonstrating both portability and QA focus. He holds a Master's in Computer Science from Kanazawa University and brings a pragmatic, detail-oriented approach to bridging developer ergonomics and operational robustness. A self-described aficionado of comfort (there’s no better place like ofuton), he balances deep technical rigor with a pragmatic sense for usability.
10 years of coding experience
9 years of employment as a software developer
Master, Computer Science, Master, Computer Science at Kanazawa University
Github Skills (47)
unit-testing10
javascript10
electron10
amazon-sqs10
testing10
net10
typescript10
dotnet10
numpy10
scala10
asp-net10
aws10
vue10
typescript-types10
dotnet-core10
Programming languages (24)
Github contributions (5)
VOICEVOX/voicevox
Aug 2021 - Jul 2022
無料で使える中品質なテキスト読み上げソフトウェア、VOICEVOXのエディター
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:73 reviews, 9 commits, 13 PRs in 11 months
Contributions summary:Yusuke implemented features for the VOICEVOX editor, focusing on both the Electron-based UI and the interaction with the text-to-speech engine. They added functionality to modify engine launch modes, including a menu in Electron. The user integrated a context menu for text editing, improving user interaction with the UI. They also addressed type definition errors and refactored the code to improve the API client and Engine connection, and cleaned up dependencies.
voicevox
softwaremill/elasticmq
Oct 2019 - Mar 2020
In-memory message queue with an Amazon SQS-compatible interface. Runs stand-alone or embedded.
Role in this project:Back-end Developer / Test Automation Engineer
Back-end Developer / Test Automation EngineerContributions:6 commits, 3 PRs, 1 comment in 5 months
Contributions summary:Yusuke focused on enhancing the functionality and robustness of the ElasticMQ project, particularly concerning message handling and SQS compatibility. Their contributions included adding tests for multi-byte character support, improving message attribute validation, and implementing a string attribute verifier. The user's work also involved code changes related to message body validation and refining character validation within the message handling logic. These changes aim to improve the robustness of the SQS-compatible interface and add more extensive testing.
memorystandawsmessage-queueelasticmq
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