Mario Hayashi
Lead Engineer And Director (Contractor) at Tugboat Coding
Tokyo, Japan
Summary
👤
Senior🎓
Top SchoolMario Hayashi is a lead engineer and startup tech leader with 11+ years building full‑stack products, often as the first or founding engineer at YC and Entrepreneur First companies. He combines hands‑on delivery—from serverless data pipelines and Shopify apps to React UIs—with product and compliance leadership in regulated healthtech (HIPAA/CLIA) and high‑traffic consumer systems. Mario has designed data infrastructures that ingest billions of events, introduced cost‑saving warehousing strategies, and launched revenue channels through API and payment integrations. He now focuses on how AI is reshaping development workflows—writing about autonomous dev pipelines and agentic workflows as he prototypes and ships them. Based in Tokyo, he operates as a contractor and indie maker, rapidly building MVPs (including a biotech study portal in 10 days) and improving operational automation across teams. His background blends rigorous engineering from Imperial College with a track record of turning complex, regulated requirements into practical, revenue‑driving solutions.
11 years of coding experience
12 years of employment as a software developer
Master of Engineering (MEng), Computing, First Class Honours, Master of Engineering (MEng), Computing, First Class Honours at Imperial College LondonInternational Baccalaureate, International Baccalaureate at Vienna International School
English, German, Japanese, Spanish
Stackoverflow
877reputation
126kreached
15answers
4questions
Github Skills (102)
python-client10
cross-platform10
android10
ios10
react-native10
react10
sdk9
api9
api-client9
javascript-client9
fabric9
facebook9
native-library9
react-native-library9
mobile9
Programming languages (5)
Github contributions (5)
tugboatcoding/react-design-system-adapters
May 2020 - Oct 2020
Collection of adapters for React design systems.
Contributions:126 commits, 4 PRs, 108 pushes in 4 months
reactadaptersdesign-systemdesign-systemsreact-intl
logicalicy/teabot_stats
Nov 2016 - Feb 2021
Contributions:2 pushes, 3 branches in 4 years 3 months
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