Miguel Pérez-Holdsworth
Product designer · Design researcher · Front-end · Since 2008

Let's measure before we redesign.

I set up the A/B test, the usability study, or the evaluation harness first. Then I ship the design and hand your team the system that runs it.

Talk to me →
Love With Food, 2015. A/B tested. Method in UX Collective, 2019.
How the work runs

The part most projects skip comes first.

  1. 01
    Measure first. The hypothesis, the number that would change our minds, then the instrument.
  2. 02
    Design from the evidence. Personas from factor analysis, journeys from interviews, concepts as testable hypotheses.
  3. 03
    Build it, or build alongside. Front-end in your toolchain, and the spec I'd want to build myself.
  4. 04
    Leave the system. The repository, the protocol, the design system, the training. Your team runs it after I'm gone.
  5. 05
    Put a clock on it. Every rule expires on a schedule unless it earns its place again.
the frame · on a review clock THE DESIGNPEOPLETHE MODEL line of interaction released toobserved intocompiled into

The two arrows that touch people are crossings, so they come with consent, a meter, and a way to say no.

Work · 2008 to now

Key outcomes.

8 of 8top-task completion, up from fewer than 1 in 3Love With Food account redesign · 2016 · unmoderated study, coded
4,300+GitHub stars, 2,600+ live sites a decade onsmoothState.js · 2014 · verified via API and BuiltWith, 2026
−26%design spend, capacity doubledInovalon · 2018 · founded the Design CoE
48→72%expert agreement, with a NO-GO on the recordSonder · 2020 to now · 13 fidelity cycles
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On the record

“We trusted him to interview our customers on our behalf to get a true unbiased voice-of-the-customer.”

Director, Business Development · Arrow Electronics · 2020

“The quality of work was extremely high, especially given the short timeline.”

Founder · Tenasol · 2024

“A transformative force multiplier.”

Hiring manager · Avalere Health / Inovalon · 2019

“Easily one of the most brilliant product designers I've worked with.”

Director of Product Management · CID Entertainment · 2016

“…his dedication to growing the skills and careers of the developers he led.”

Direct report · WebLinc Commerce · 2014

“I'd hire him in a second, and you should strongly consider doing the same.”

Colleague · WebLinc Commerce · 2014
Next step

Write to me.

Tell me a little about the problem. We'll work out the next step, whether that's a screen, a panel slot, or a scoping call.

mail@miguel.design →
Denver, Colorado.
On the traditional and unceded territories of the Cheyenne, Arapaho, and Ute Nations.
© 2026 Miguel Ángel Pérez-HoldsworthNN/g UX Certification · UX Management · UXC #1029705