Ryuma Yoshida
Software Engineer (Platform Engineer)
Chiyoda, Japan
Summary
👤
Senior🎓
Top SchoolRyuma Yoshida is a platform-focused software engineer with 11 years building and operating large-scale data and cloud-native infrastructure across DMM.com, Yahoo Japan, and Z Lab. He moved from Hadoop and Presto-based analytics at DMM to R&D of Kubernetes-based platforms and Zero Trust access control at Z Lab, and now continues platform engineering at enechain. A hands-on contributor to SPIFFE/SPIRE and Fluentd, he has improved runtime security (readiness endpoints, KeyManager disk behavior) and strengthened logging QA in CNCF projects. He blends operator experience—cluster upgrades, Ansible automation, and cloud migrations—with research-led work on authentication/authorization for Zero Trust. Based in Chiyoda, Tokyo, he pairs deep systems knowledge with a practical bent for test automation and reproducible infra engineering.
11 years of coding experience
10 years of employment as a software developer
学士 情報工学, 学士 情報工学 at Tokyo Denki University
Github Skills (12)
ruby10
fluentd10
go10
testing10
collector9
devops9
test-automation9
data-collection9
configuration-management9
cicd8
cnc6
logging6
Programming languages (12)
Github contributions (5)
spiffe/spire
Apr 2019 - Sep 2022
The SPIFFE Runtime Environment
Role in this project:
Backend & DevOps Engineer
Backend & DevOps EngineerContributions:20 reviews, 111 commits, 55 PRs in 3 years 5 months
Contributions summary:Ryuma focused on removing the `umask` flag from the server and agent CLI, streamlining the configuration process for the SPIFFE runtime environment. The user also contributed to the auto-creation of directories for the KeyManager "disk" agent plugin and fixing the related tests, enhancing the functionality of the agent. Furthermore, the user added the readiness endpoint for health checking, improving system reliability.
runtimespifferuntime-environment
fluent/fluentd
Jul 2017 - Sep 2017
Fluentd: Unified Logging Layer (project under CNCF)
Role in this project:QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:16 commits, 4 PRs, 3 comments in 2 months
Contributions summary:Ryuma primarily focused on testing and improving the Fluentd project. They wrote and added tests for the TSV formatter, including configurations, delimiters, and the `add_newline` parameter. Additionally, the user identified and fixed a configuration issue in the LabeledTSV formatter. The user also addressed minor issues such as typo fixes and updating URLs.
fluentdrubyloggingunified-loggingcncf
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