Senior Product Designer, UI/UX
Mercor • Remote
Company
Mercor
Hourly rate
$80 – $110/hr
Location
Remote
Listed
Today
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Help a leading AI lab define what great design looks like, and build the prototypes that prove it.
What you'll do
- Partner with AI researchers to identify best-in-class UI and UX patterns, and turn them into clear principles and rubrics that define what great design looks like.
- Build polished, interactive web prototypes, in code or with AI-native tools such as Cursor, v0, Lovable or Bolt, that showcase strong and diverse design patterns across many product categories.
- Review AI-generated interfaces and prototypes, and give specific, actionable written feedback on layout, hierarchy, interaction, motion and visual polish.
- Explore a wide range of visual styles, frameworks and animation approaches, from focused productivity tools to playful consumer apps and games.
- Collaborate with other designers and researchers to keep standards consistent and keep raising the quality bar.
What you need
- Fluent proficiency in Polish
About Mercor and legal notices
About Cincinnatus LLC
Cincinnatus LLC is an enterprise staffing company that partners with leading technology companies to source and employ highly skilled professionals for contingent and contract-based opportunities. Cincinnatus serves as the employer of record for these engagements, providing W-2 employment, payroll, benefits, and compliance, while placing employees directly within client teams to work on high-impact initiatives.
Equal Employment Opportunity
Cincinnatus is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, reproductive health decisions, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, political views or activity, or any other legally protected characteristic.
Skills & Categories
Frequently Asked Questions
How do I apply for the Senior Product Designer, UI/UX role at Mercor? +
Use the Apply button on this page. It opens Mercor's own application form, so you apply directly with them.
What does this Mercor role pay? +
Mercor lists $80 – $110/hr. Confirm the exact rate and terms in their application.
Is this role remote? +
The listing is remote. Check Mercor's posting for any country or time zone requirements.
Interview Prep
Sample questions for a UI/UX Designer role, written in-house to help you prepare.
How do you decide what user research method to use, like interviews versus surveys versus usability testing, for a given design question?
The method depends on what kind of question I'm answering. Interviews surface the why behind behavior and are good early, when I'm still forming hypotheses. Surveys validate how common a pattern is across a larger sample once I already have a hypothesis. Usability testing answers whether a specific design solution actually works, which needs a working prototype rather than abstract questions.
How do you decide how much fidelity a prototype needs to be before testing it with users?
Low-fidelity wireframes are enough for testing information architecture and flow, since users can evaluate structure without visual polish distracting them. Higher fidelity becomes necessary once I'm testing something visual details actually affect, like whether a specific button reads as clickable, since a rough sketch won't answer that question reliably.
How do you balance visual design consistency with a design system against the need for a specific screen to solve a unique problem?
I default to the design system's existing components and patterns, since consistency reduces cognitive load for users across the product. I only deviate when a genuine, well-justified need exists that the system doesn't already solve, and when I do deviate, I feed that pattern back into the system rather than leaving it as a one-off exception nobody else can reuse.
How do you interpret conflicting signals between what users say they want in an interview and what usability testing shows they actually do?
I weight behavioral data from usability testing more heavily than stated preference from interviews, since users are often inaccurate predictors of their own future behavior. Interviews are still valuable for understanding motivation and context, but when there's a direct conflict between stated preference and observed behavior, the behavior is the more reliable signal for the actual design decision.
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