Gaku Ueda is a seasoned software leader and startup founder with 17 years of experience building and scaling engineering teams and products. As Co-founder and CEO of MODE, Inc., he helps businesses collect data from the physical world while translating engineers' ideas into shipped products. Previously he led engineering at Google and served as Director of Engineering at Twitter, bringing deep experience in productization and international growth. He combines hands-on backend contributions—such as bug fixes and localization work on the rubycas SSO project—with strategic leadership across large consumer platforms. Based in Los Altos, he pairs operator grit with a developer’s attention to detail, often stepping into code to unblock teams. Colleagues credit him for turning technical visions into practical, customer-facing systems.
Provides single sign-on authentication for web applications, implementing the server-end of Jasig's CAS protocol.
Role in this project:
Backend Developer
Contributions:13 commits in 9 months
Contributions summary:Gaku primarily contributed to the backend of the `rubycas-server` project, focusing on bug fixes and minor feature enhancements. They addressed authentication failures related to missing salts and corrected issues with localization, ensuring the correct language UI was displayed. Additionally, they modified the CSS for the simple theme to improve its appearance. Their contributions also included merging branches.
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