AI UX & Product Design Evaluator

Mercor; Greater London; Remote; GBP 75,000 - 90,000; Full time

Job summary

Mercor is collaborating with a leading AI research organization to recruit experienced UI/UX and product designers. You will define what excellent design work looks like by creating task-specific grading criteria and scoring samples with rigorous written justifications.

You will apply consistent, evidence-based judgment to ensure scores are reproducible and defensible, iterating on feedback from senior reviewers to improve the evaluation process and outcomes.

Qualifications

• 5+ years of professional experience in product design, UI/UX, or design systems for real digital products (not brand or marketing sites).
• Background at leading digital-product and UX studios, in-house product-design teams at major product-led companies, or e-commerce and marketplace companies with sophisticated customer portals and dashboards.
• Experience across one or more relevant tracks: Product / UI / Design Systems Designer, UX Lead, UX Writer / Content Designer, or digital Product / Business Analyst.
• Deep fluency in day-to-day craft: interaction and visual design, design systems, responsive layouts, end-to-end product flows, prototyping and production handoff in Figma, and articulating critique the way a design or UX lead would in a review.
• Exceptionally strong written communication, with the ability to explain exactly why a piece of work does or does not meet the bar for a real product and its users.
• Detail-oriented, consistent, and comfortable having your judgment reviewed and calibrated against peers.
• Prior experience with AI training, evaluation, or human-data projects is a strong plus.

Responsibilities

• Design precise, task-specific grading criteria for real-world digital product and UX deliverables (design systems and component libraries, responsive UI layouts and dashboards, end-to-end product flows such as onboarding, checkout, and booking, logged-in customer portals, UX writing and product content, and design-to-engineering/production handoff).
• Score AI-generated and human work samples against those criteria, with detailed written justifications for every score.
• Apply consistent, evidence-based judgment so that scores are reproducible and defensible.
• Incorporate structured feedback from senior reviewers and iterate quickly on your work.

Skills

UX design

Design systems

Figma prototyping

Responsive layouts

Prototyping

Written communication

Tools

Figma

Job description

Mercor is collaborating with a leading AI research organization to recruit experienced UI/UX and product designers. You will define what excellent design work looks like by creating task-specific grading criteria and scoring samples with rigorous written justifications.

You will apply consistent, evidence-based judgment to ensure scores are reproducible and defensible, iterating on feedback from senior reviewers to improve the evaluation process and outcomes.