Tsubasa Umeuchi
Security Engineer at GMO Flatt Security Inc.
Tokyo, Japan
Summary
🤩
Rockstar🎓
Top SchoolTsubasa Umeuchi is a security engineer based in Tokyo with nine years of experience building secure, production-ready platforms and CI/CD pipelines. He has a strong background in platform and web application engineering, having worked across CyberAgent, Flatt Security, and GMO Flatt Security, and brings hands-on expertise in both defensive security and DevOps practices. Tsubasa contributes to notable open-source projects like PipeCD, where he improved UI/UX, added configuration visibility with syntax highlighting and secrets masking, and hardened deployment workflows for OCI registries. His academic foundation includes a master’s in information science, which complements a pragmatic approach to translating research-minded rigor into operational controls. Colleagues rely on him for bridging frontend usability and backend operational safety, and he often surfaces subtle UX/security trade-offs that teams overlook. He balances a developer’s attention to polish with a security engineer’s insistence on auditable, automatable processes.
9 years of coding experience
6 years of employment as a software developer
Bachelor's degree, Software and Information Science, Bachelor's degree, Software and Information Science at Iwate Prefectural UniversityMaster's degree, Information Science, Master's degree, Information Science at 北陸先端科学技術大学院大学
Github Skills (5)
go10
helm10
cicd10
kubernetes-pods9
kubernetes9
Programming languages (5)
Github contributions (5)
pipe-cd/pipecd
May 2022 - Jun 2022
The One CD for All {applications, platforms, operations}
Role in this project:
Full-stack & DevOps Engineer
Full-stack & DevOps EngineerContributions:53 reviews, 19 commits, 43 PRs in 23 days
Contributions summary:Tsubasa's contributions primarily involved enhancing the user interface and improving the CI/CD pipeline. They added a GitHub link to the header and refined the UI for the application list by adjusting the width and content display. Moreover, they implemented a feature to display the piped configuration on the web console, incorporating syntax highlighting and masking sensitive data. Their work also included updating and validating helm configurations for OCI registries and adding a restart command to the web API.
serverlessistiocdlambdaplatforms
Szarny/pipecd
May 2022 - Aug 2022
Continuous Delivery for Declarative Kubernetes, Serverless and Infrastructure Applications
Contributions:240 pushes, 34 branches, 8 tags in 2 months
orchestrationdevopsserverlesscontinuousdeclarative
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.