UX Diagnostics

UX Testing That Makes Products Shine

"I help product teams find UX issues before their users do."

What I Do

I provide hands-on UX testing and usability reviews for digital products:

  • UX audits — I identify usability issues and broken flows.
  • Bug reporting — I find what internal teams often miss.
  • Actionable reports — clear, structured, and prioritized.
  • Optional walkthroughs — I explain what's wrong and how to fix it.

Who I Am

Hi, I'm Yisus — a UX tester with over 10 years of experience across the entire software development lifecycle.

I've worked as a developer, team lead, project manager, and product manager. That means I understand both how things are built and how users experience them.

We can communicate in either English UK flag or Spanish Spain flag

Check out my experience on LinkedIn

Why Work With Me

  • Plenty of experience in product, development, and UX.
  • No code access required — just a URL.

    I don't need (or want) to see your code. Just send me your testing, preprod or production URL and I'll run all tests there.

  • Tested by a human.

    Even though AI testing is great, it can't catch (at least for now) many of the subtle details that real human testers can. I rely on experience, intuition, pattern recognition, and user empathy — something algorithms still struggle to replicate.

  • I test like your users, not like your developers.

    You might already have your own testers. But there's a catch: they might be biased or fatigued because they know the product inside-out. I bring a fresh pair of eyes. I see your product as a new user would, which helps uncover issues your team may have become blind to over time.

  • Structured, actionable reports.
  • Fast turnaround, no corporate red tape, no strings attached.

    Use me when you need me. I can test single features or the whole website/app/API.

How It Works

  1. You send me the URL of your product (test, pre-prod, or live).
  2. I test it thoroughly as a real user would.
  3. You receive a structured report with UX issues, severity levels, and improvement recommendations.
  4. Optional: we can review the findings together if you wish.

No codebase access, no setups, no permissions, no headaches — just focused UX testing.

How to Get in Touch

If you want a fast, clear, and actionable UX test, just