Fumio Sagawa
代表取締役, エンジニア at アシラス株式会社
Tokyo, Japan
Summary
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SeniorFumio Sagawa is a Tokyo-based founder and engineer with 13 years of experience building web applications and production-ready AI systems. As CEO and lead engineer at アシラス株式会社 since 2016, he specializes in translating vague requirements into stable semantic contracts using structured prompts, JSON schemas, evaluation loops, and Efficient Prompting layers. He practices Multi-AI Driven Development (MADD), designing redundancy-first multi-agent orchestration and drift mitigation pipelines to ensure reliable, collaborative software creation. With an M.S. in Mathematical Physics, he brings rigorous quantitative thinking to pragmatic engineering and prompt design. Bilingual in English and Japanese, he is open to AI and web engineering collaborations and focuses on preventing meaning drift in real-world deployments. A less obvious strength is his emphasis on auditable semantic contracts—making AI behavior interpretable and verifiable across development lifecycles.
13 years of coding experience
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (26)
angularjs10
angular8
javascript8
devextreme7
react5
typescript4
router4
interaction3
html3
react-components3
thunderbird3
rxjs2
gulp2
seed2
yeoman-generator2
Programming languages (4)
Github contributions (5)
albatrosary/albatrosary.github.io
Mar 2015 - Apr 2015
Contributions:72 commits, 67 pushes, 1 branch in 1 month
albatrosary/ashiras.xyz
Jan 2015 - Jul 2016
Contributions:168 pushes, 4 branches in 1 year 6 months
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