Tomás Stonehouse

Senior Product Designer — I make complex, high-stakes software usable.

I'm a product designer who turns tangled, high-stakes software into tools people can actually use. For the past 5, I've designed enterprise products across fintech, fraud prevention, and B2B SaaS — most recently leading the redesign of Kount's flagship fraud platform at Equifax, where the tools I design now support over a million payment decisions a day.

I care most about the fuzzy front end: framing the real problem before anyone touches a pixel, then shipping a clear solution that moves a metric the business actually watches.

Selected Work

A few problems I've owned end to end — from research and architecture to the screens that shipped.

Rules Engine Rework

Screenshot of Equifax Kount 360 Policy Management interface showing sections for segmentation, policies, and conditional services, with options to add, move, send, delete conditions, and set policy details.

Sole Product Designer

Cut rule-creation time for fraud analysts and scaled to 1M+ transactions/day.

Fraudulent Payment Review

Screenshot of a computer monitor displaying a cybersecurity case management dashboard for Equifax Kount 360, with various data panels and options.

Lead Product Designer

Rebuilt the analyst workflow around task completion and time-to-decision.