Masato K

@katomasato

Code Reviewer and Web App QA Specialist

Japan
Japanese
About me
I help developers and small teams find problems before users do. I review Python, FastAPI, TypeScript, and AI-assisted code; test web-app flows; and improve README and handover documentation. You receive prioritized findings, reproducible steps, screenshots, and recommendations. I also review AI/LLM workflows. Previously, I was CEO and co-founder of Studios Pong, LLC, participating in an AI-agent business-formation project and sharing an earlier SaijinOS repository. Operations concluded in June 2026. SaijinOS is my self-developed project, not a completed client development engagement.... Read more

Skills

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katomasato
Masato K
Offline • 
Average response time: 1 hour

See my services

Software Testing
I will test and review your ai generated python code
From$25 / projectMore details
Software Testing
I will benchmark your ai coding agent with a clear test report
From$30 / projectMore details

Portfolio

Work experience

富士山清水港クルーズ株式会社_- 富士山を海の特等席で

First / Second Officer

富士山清水港クルーズ株式会社 - 富士山を海の特等席で

Jul 2019 - Nov 2023 • 4 yrs 4 mos

Worked as a second officer and first officer in passenger-ferry operations. Responsibilities included vessel operations and maintenance, regulatory documentation, safety-meeting agendas and minutes, crew training, drill planning and reporting, and coordination with other departments. This maritime role developed my experience in careful checking, clear instructions, and structured documentation.