Eric Joseph Lee, Product Designer

I design AI-powered products, and build the prototypes that prove them.

Five years designing fintech, B2B, and AI products. I'm a Creative Technologist at ProtoPie, where I build AI-driven prototypes and teach enterprise teams to use ProtoPie's AI tools.

Debit cardEnding 4021

Active

Purchases and withdrawals allowed

Try it. From the card security work at Central 1, where every state was designed, including the ones we chose not to show.

Selected work

Central 1, 2022

Card Security: Locking & Reporting

Banking Web Application Feature Enhancement

Increase in debit card usage: 18%; Increase in debit card usage
Support calls reduced: 20%; Support calls reduced

42Dot in-vehicle HMI — navigation, music, and AI features

Under NDA

42Dot (via ProtoPie), 2025

Automotive HMI — Gleo AI

NDA · Hyundai subsidiary · Autonomous mobility platform

AI system contribution: Gleo AI; AI system contribution
Hardware-integrated demos: ProtoPie Connect; Hardware-integrated demos

MeaningfulWork, 2023

3-Sided Volunteer Matching Platform

End-to-end product platform development

Volunteers in year one: 180+; Volunteers in year one
Nonprofits in year one: 140+; Nonprofits in year one

Project overview — 7 finance calculators, 2-week sprint

Central 1, 2022

Finance Calculators Visual Re-Vamp

7-calculator UI redesign for 300+ credit union clients

Calculators redesigned: 7; Calculators redesigned
Credit union clients: 300+; Credit union clients

Prototypes and lab

Working prototypes, a shipped tool, a public tutorial series, and the research behind ProtoPie's AI features.

ProtoPie

ProtoPie Kinetics

Shipped a live product from zero in 3 weeks

Car diagnostics dashboard — live vehicle health metrics

ProtoPie

Car HMI — AI-Powered Vehicle Diagnostics

Conversational AI diagnostics demo, shown at IAA Mobility 2025 in Munich

ProtoPie

Bank App — Official ProtoPie Tutorial Series

Published fintech prototype series — YouTube tutorials and 4 written articles

ProtoPie showcase

eVTOL Cockpit HMI

Showcase prototype of a safety-critical cockpit interface, built around a real aircraft

Crypto trading app — balance, prices, and portfolio

ProtoPie

Crypto App — Coinbase-Style Trading Prototype

Motion-forward trading and portfolio app with chart animations and gesture navigation

Under NDA

ProtoPie

ProtoPie Connect: AI Enablement Docs for Client Engineering

Enterprise skill.md Authoring for ProtoPie Connect

ProtoPie (internal research program)

AI Reliability Architecture

A framework for building trust layers around AI outputs