Uchio Kondo
Product Engineer at SmartHR, Inc.
Fukuoka Prefecture, Japan
Summary
🤩
Rockstar🎓
Top SchoolUchio Kondo is a product engineer based in Fukuoka with 15 years building production systems, developer tooling, and container/runtime infrastructure. He combines deep Ruby and systems programming expertise (mruby, mruby core contributions) with practical experience in Go, Rust, and C, and has shipped container technology such as the OSS haconiwa runtime and contributions to the Rust youki project. At GMO Pepabo he led architecture and developer productivity efforts—designing a custom container hosting service, introducing infrastructure as code, and later re-architecting a company-wide data platform using Google Cloud. He’s active in SRE and observability, especially visualization, and has practical experience with tooling like Prometheus, Consul, and terraform. A community-driven OSS maintainer, he authors projects spanning eBPF-based tracing (RbBCC, BPFQL) to process checkpoint/restore tooling (Grenadine). Outside work he’s an avid coffee, curry and cake enthusiast—often turning that curiosity into teaching and community mentorship.
15 years of coding experience
15 years of employment as a software developer
University of Tokyo
English, Japanese, Korean, Chinese, Spanish
Github Skills (33)
ruby-rails10
kubernetes10
container10
docker10
system-programming10
testing10
alertdialog10
alertifyjs10
rails10
alertview10
padrino10
alerts10
c1110
dockers10
ruby10
Programming languages (16)
Github contributions (5)
padrino/padrino-framework
Mar 2011 - Jun 2013
Padrino is a full-stack ruby framework built upon Sinatra.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 commits in 2 years 3 months
Contributions summary:Uchio primarily contributed to the Padrino framework's core and generator components. Their work included adding status messages to the logger, fixing a JRuby test, and ensuring the correct generation of database configurations for different database adapters like PostgreSQL and MySQL. They also addressed version compatibility issues with the MySQL gem, ensuring the project's continued functionality. Furthermore, the user implemented timestamping for migrations when specified in the project settings.
ruby-on-railsruby-frameworksinatrarailsfull-stack
mruby/mruby
Jun 2016 - Sep 2020
Lightweight Ruby
Role in this project:Back-end Developer
Back-end DeveloperContributions:2 reviews, 22 commits, 9 PRs in 4 years 3 months
Contributions summary:Uchio contributed to the core functionality of the mruby project. Their work included implementing the `chroot` directory operation, fixing a type issue with `int` to align with the mruby architecture and adding a test case to address a reported bug. They made minor adjustments to existing code and refactored test files. This indicates a focus on enhancing the core libraries and ensuring the stability of the mruby environment.
ruby
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