Shohei Koyama
コーポレートエンジニア at DXER株式会社
Tokyo, Japan
Summary
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SeniorShohei Koyama is a Tokyo-based corporate engineer and technology leader with 11 years of experience building and operating reliable infrastructure and developer-facing systems. He has held SRE and infrastructure roles across startups and scale-ups, progressing to CTO-level responsibilities and current engineering positions that blend hands-on ops, DevOps, and corporate systems. Shohei contributes to open-source monitoring tooling—most notably extending mackerel-agent-plugins to monitor Amazon RDS Aurora via CloudWatch—demonstrating a practical focus on observability and systems integration. Comfortable shipping production-grade features and refining operational details like metric collection and graphing, he bridges low-level hardware experience with modern cloud practices. Known for pragmatic problem solving, he brings both managerial experience and deep troubleshooting skills honed from hardware technician to SRE manager.
11 years of coding experience
Github Skills (10)
ack10
go10
aws10
cloudwatch10
metric10
golang9
docker4
dockers4
kubernetes3
kubernetes-pods3
Programming languages (5)
Github contributions (5)
mackerelio/mackerel-agent-plugins
Sep 2016 - Jan 2017
Plugins for mackerel-agent
Role in this project:
Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:16 commits, 2 PRs, 4 comments in 4 months
Contributions summary:Shohei primarily contributed to building out a plugin for the Mackerel agent, specifically focused on monitoring Amazon RDS Aurora instances. Their work involved adding features, including metric collection and graph definitions, by interacting with the AWS CloudWatch API. They implemented functionalities such as fetching metrics and integrating with the Mackerel plugin structure, showing a focus on system monitoring and data collection. Subsequent commits fixed paths and refined graph labels for correct functionality.
golangagentmackerel-agentmackerelmetrics
sioncojp/terraform-provider-aws
Aug 2018 - Dec 2021
Terraform AWS provider
Contributions:9 pushes, 5 branches in 3 years 4 months
providerterraform-modulesaws-terraform-providerterraformterraform-provider
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