Jae Choi

Co-founder @ Sponge | YC W26

Co-founder

2026Co-founder· Sponge (YC W26)

Founder · since 2026

Company

Sponge (YC W26)

Role

Co-Founder

current

Stage

—

no public source

Raised

—

no public source

Based

San Francisco Bay Area

current

Founder / co-founder — the company's markEmployee / research role

Profile coverage5 of 7 · missing posts, contact

Sponge

Financial infrastructure for the agent economy

Experience

Career

Sponge (YC W26)
Co-founder
Co-Founder · San Francisco Bay Area · 2026 – Present
2026
Stripe
Software Engineer · New York, United States · 2019 – 2025
2019
Stripe
Software Engineer · San Francisco Bay Area · 2019
2019
Flexport
Software Engineer · San Francisco Bay Area · 2019
2019
Sumo Logic
Software Engineer · San Francisco Bay Area · 2018
2018
IBM
Software Engineer · Toronto, Canada Area · 2017
2017
BlackBerry
Software Engineer · Waterloo, Canada · 2016
2016
Irdeto
Software Engineer · Ottawa, Canada · 2016
2016
Imagine Communications
Software Engineer · Waterloo, Canada · 2015
2015

Co-founder Sponge (YC W26). Ex-Stripe Crypto.