Ji Su Hiatt

Currently building at Visa. UC Berkeley Haas MBA candidate. Based in SF.

More about me
Experimental builds
Cozy walks through the PresidioPlastic DNA Model
Business problems I've solved

Building a shopping agent to demonstrate the Visa Intelligent Commerce APIs and to decrease developer time to activation.

Cut partner onboarding from a multi-week, sales-led process to minutes with a sandbox environment and self-service sign-up.

Made fund and asset performance legible at every level of detail, improving sentiment among the advanced investors driving the largest investments.

Lifted repayment rates, retention, and credit usage through a mobile app redesign that raised the app store rating from 2.8 to 4.9 stars.

Delivered designs to launch Escrow Express, generating +$100M in deposits in two weeks, 65% better user efficiency, and 4,500 back-office hours saved annually.

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© 2026 Ji Su Hiatt.