Usability testing consultant for product teams
Usability testing services
Understand how real users navigate your website, app, prototype or complex product workflow. I plan and run usability tests that uncover friction, evaluate critical workflows and turn observations into actionable recommendations for your product team.
Format
Moderated & unmoderated
Languages
German, English, Polish
Experience
25+ usability studies
What is usability testing?
Find out where users struggle and why
In a usability test, real people from your target group complete realistic tasks with your product and think aloud while I observe. This qualitative user experience testing reveals usability issues that analytics can’t explain. Sessions are a small sample, so the results show where and why people struggle, not how many. I mark this boundary in every report.
Where people get stuck
Hesitation, misunderstandings and failed tasks: observed, not assumed.
Why it happens
What people do and say explains the reasons behind each problem.
Which issues matter most
Each issue rated by how much it blocks the user’s goal and yours.
When should you conduct usability testing?
A good fit if
A launch or development handoff is coming and you want to know the flow works.
You redesigned something and want to check it does what it should.
Conversion drops or users abandon a key flow and analytics can’t tell you why.
You’re launching a new feature or a complex user flow and need to know people can complete it.
Your team disagrees about what is “intuitive”.
Not the right fit if
You don’t know yet what to build. Start with discovery research.
You need to know how many users do something. Use analytics or an A/B test.
The decision is already made and you only need approval.
You need functional or QA testing for bugs and browser issues.
Need a quick expert opinion instead? A UX audit reviews your flow without recruiting participants and delivers within days.
What I can test
What can we test?
Websites, apps and prototypes, tested remotely with people from your target group in German, English or Polish.
Websites and web apps
Website usability testing for sign-up, onboarding, search, product pages, checkout, payment or settings: any flow where people need to get something done.
Mobile apps
Tested on real devices, in the context people actually use them.
Clickable prototypes
Figma prototypes from mid-fidelity onwards. This is the cheapest moment to change direction, before development starts.
Comparative testing
Your product side by side with an alternative version or a competitor, to see which decision logic works better.
Accessibility
Whether people with different needs can find, understand and complete key tasks.
SaaS, B2B and decision tools
SaaS products, specialist tools, calculators and dashboards where people need to understand results before they act on them.
How the usability testing process works
STEP 1
Scope the question
We start with the decision behind the test: what you need to know, which flow matters and what would change your plans.
STEP 2
Plan and recruit
I write the test plan and tasks, define participant criteria and plan recruitment from your customers, a research panel or both.
STEP 3
Run the sessions
Participants complete realistic tasks and think aloud, either moderated live or unmoderated on platforms such as UserTesting, UserZoom, Maze or Lookback.
STEP 4
Analyze and prioritize
I group observations into patterns and rate each issue by its impact. For longer studies you get interim findings, so blockers can be fixed early.
STEP 5
Recommendations and readout
We go through the findings together live and agree what to fix, test further or leave.
What you’ll receive
Your usability testing report rates every finding by its impact on the user’s goal and on yours, with a clear line between what was observed and what is interpretation.
A test plan
Research question, tasks and participant criteria, agreed before sessions start.
Recordings and notes
Session recordings and notes, where participants have agreed to recording.
Prioritized findings
What happened, where, how often it came up and why it likely matters.
Concrete recommendations
What to fix now, what to test further and what can wait.
A live readout
We go through the evidence together and agree next steps.
Ready to see where your users get stuck?
Usability testing in practice
Example: an agritech team had built a complex scenario calculator. Seven remote usability sessions in Polish turned the observations into clear requirements for the next version. Each case study below shows the problem, the research approach and the product decision it led to.
Usability testing cost and timeline
Cost and timeline depend on the number of sessions, how specific your target group is, the test format and how many flows we cover. A research sprint takes 2 to 3 weeks, depending on recruitment. Recruitment and participant incentives are billed separately. Tell me about your project in a free intro call and you get a fixed offer.
Book a Research Sprint within 30 days of your Focused UX audit and the €690 is credited toward it. Prices are net; VAT is added based on your country and tax status.
Independent UX consultant
Why work with me?
I’m a UX researcher and psychologist (M.Sc.) working as an independent usability testing consultant for product teams. You work with me directly, from the first question to the final recommendations.
Psychology meets product work
I know how people perceive, decide and hesitate. I translate that into findings your team can act on.
25+ usability studies
Websites, apps, prototypes and complex B2B tools, including the Urlaubsguru product detail page and an agritech scenario calculator.
German, English and Polish
I moderate sessions in all three languages, so you can test with your real target groups.
FAQ
Frequently asked questions
Not sure if your flow works for real users?
Tell me which product, flow or prototype you’re unsure about. In a free 30-minute call we clarify the question, the right test format and what it takes to get evidence you can act on.
Diana Szczepanik
UX Researcher & CRO Consultant, Psychologist (M.Sc.)