2x founder

Joseph McAllister

CTO at MouseCat | AI to fight fraud

Co-founder

MouseCat· Winter 2026 🇺🇸 New York, New York, United States

in LinkedIn

2026Co-founder· MouseCat (YC W26)

Founder · since 2017

Company

MouseCat (YC W26)

Role

Co-Founder & CTO

current

Stage

—

no public source

Raised

—

no public source

Based

San Francisco, California, United States

current

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

Source: LinkedIn work history

Profile coverage5 of 7 · missing posts, contact

MouseCat

AI-powered fraud investigations

Winter 2026

Experience

Career

MouseCat (YC W26)
Co-founder
Co-Founder & CTO · San Francisco, California, United States · 2026 – Present
2026
Coinbase
Tech Lead - Feature Platform - Risk & ML · New York, United States · 2023 – 2026
2023
Coinbase
Software Engineer - ML Platform · New York, New York, United States · 2022 – 2023
2022
Microsoft
Software Engineer · Seattle, Washington, United States · 2021 – 2022
2021
Handled
Technical Product Manager · 2020
2020
Roo
Co-founder
Co-Founder · 2017 – 2020
2017
Microsoft
Software Engineer Intern · Greater Seattle Area · 2019
2019
Cornell University College of Engineering
Undergraduate Teaching Assistant · 2019
2019
World Wide Technology
Software Development Intern · Greater St. Louis · 2018
2018
World Wide Technology
Software Development Intern · Greater St. Louis Area · 2017
2017

Bio

Joseph McAllister is the Co-Founder and CTO of MouseCat. Before MouseCat, Joseph spent 4 years building systems that power every risk decision at Coinbase. He focused on streaming pipelines, large-scale data processing workloads, and improving ACH and ATO risk models. While studying Computer Science at Cornell University, he founded Roo Storage, which was acquired in 2020 by Handled (now UniGroup).