Hayato Kiwata
Chiyoda, Japan
Summary
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RockstarHayato Kiwata is a backend-focused software engineer with seven years of experience specializing in container technologies and DevOps automation. Based in Chiyoda, Japan, he actively contributes to open-source container projects—most notably making reliability and usability improvements to containerd's nerdctl CLI, addressing image management, orphaned files, and journald logging metadata. His work shows a pragmatic focus on stability, system integration, and developer experience for container workflows, with hands-on expertise in rootless operation and image lifecycle edge cases. Quietly detail-oriented, he improves core tooling that many cloud-native users rely on, bridging low-level container behavior and day-to-day operational needs.
7 years of coding experience
Github Skills (13)
container-management10
command-line-interface10
debug10
containerd10
docker10
go10
dockers10
command-line10
cli10
testing9
go-testing9
devops8
networking7
Programming languages (6)
Github contributions (5)
containerd/nerdctl
Dec 2023 - Feb 2025
contaiNERD CTL - Docker-compatible CLI for containerd, with support for Compose, Rootless, eStargz, OCIcrypt, IPFS, ...
Role in this project:
Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:33 reviews, 8 PRs, 82 comments in 1 year 1 month
Contributions summary:Hayato primarily contributed to bug fixes and improvements in the `nerdctl` CLI, focusing on container creation and image management. They addressed issues related to orphaned files, image deletion, and detachment behavior, improving the reliability and usability of the tool. The commits also included enhancements to the logging functionality, adding metadata to journald log entries, indicating knowledge of system integration and potentially related DevOps aspects. These changes demonstrate the user's focus on enhancing the core functionality and stability of the container management tool.
docker-imagecomposemultiarchcliipfs
haytok/KubeArmor
Jun 2023 - Nov 2023
Cloud-native Runtime Security Enforcement System. [CNCF Sandbox Project]
Contributions:46 pushes, 14 branches in 5 months
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