Ryosuke Tsuji
Exective Officer CTO at 株式会社エアークローゼット
Chiyoda, Japan
Summary
👤
Senior🎓
Top SchoolRyosuke Tsuji is an experienced technology leader and CTO with 13 years building full-stack web platforms and infrastructure, currently driving AI-first development at airCloset where he leads design and engineering teams. He is focused on practical AI engineering patterns—knowledge graphs as a substrate for agents, MCP server ergonomics, and structural approaches to contain hallucination—and is actively building cortex, an internal AI development platform that automates PR review, self-healing incident response, and a product graph over code, docs, DB, and infra. With a background across Rakuten and startups, he blends hands-on backend, frontend, and infra engineering with recruitment and offshore team management. Based in Chiyoda, Japan, he’s available for discussions on AI harness design and the infrastructure that makes AI coding agents reliable, and uniquely combines legal/public administration training with deep technical leadership.
13 years of coding experience
6 years of employment as a software developer
High School, Infantry, High School, Infantry at Shibaura Institute of Technology Kashiwa high schoolBachelor of Laws (LLB), Public Administration, Bachelor of Laws (LLB), Public Administration at Sophia University
Japanese, English
Github Skills (46)
firefox10
testing9
node-module9
chromium9
javascript-api9
automation9
chrome9
fluent-interface9
developer-tools9
nodejs8
cron8
caching7
aws7
python7
continuous-integration7
Programming languages (5)
Github contributions (5)
air-closet/gmo-payment-node
Jun 2015 - Jul 2024
Node.js client library for the GMO Payment Platform.
Contributions:1 PR, 9 pushes, 2 branches in 9 years 2 months
nodejs-client
air-closet/node-np
Nov 2016 - Nov 2020
Contributions:2 reviews, 1 PR, 1 push in 4 years
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