Daio Yoshikawa
ソフトウェアエンジニア at クラスメソッド株式会社
Hiroshima, Japan
Summary
🤩
Rockstar🎓
Top SchoolDaio Yoshikawa is a software engineer based in Hiroshima with eight years of experience building scalable web applications and infrastructure. He currently develops and maintains Zenn, a high-traffic tech information-sharing platform (10M+ monthly pageviews, 100k+ users), using Next.js and Ruby on Rails. A T-shaped engineer, he specializes in backend systems but also delivers React frontends and AWS infrastructure, and has led small engineering teams as a tech lead on contract projects. Comfortable owning the full stack from tech selection to initial builds, he actively contributes to open-source communities and balances practical product delivery with community-minded engineering. Unusually for a developer with a law background, he combines formal legal study with hands-on software craftsmanship, bringing a pragmatic, systems-thinking approach to platform development.
8 years of coding experience
法学部, 法学科, 法学部, 法学科 at 立命館大学
Chinese, Japanese
Github Skills (89)
datetime10
react-table10
uint8array10
excel10
magic-numbers10
pagination10
ai10
cli10
date-formatting10
typescript10
cloud-infrastructure10
momentjs10
dayjs10
buffer10
llm10
Programming languages (20)
Github contributions (5)
dyoshikawa/rulesync
Jun 2025 - Jul 2026
A Utility CLI for AI Coding Agents
Contributions:90 releases, 10 reviews, 663 PRs in 1 year 1 month
aicliai-agentsai-codingllm
cm-dyoshikawa/niseline
Jan 2022 - Jan 2022
NiseLine is inspired by LocalStack. Goal of this tool is to create a mock service for LINE.
Contributions:2 releases, 98 commits, 35 PRs in 12 days
localstacklinebotliffliff-sdkapi
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