Senior Product Designer for AI UI/UX Prototyping

Annotation Academy; United States; Remote; USD 120,000 - 170,000; Full time

Job summary

Cincinnatus LLC is seeking senior product design professionals to help define great UI/UX for AI-driven web and game interfaces. You will work with researchers to establish core design principles and prototype polished interfaces using code or AI-native tools, delivering actionable feedback and advancing design standards.

The role emphasizes hands-on prototyping, strong user-centered design grounding, and the ability to engage 40 hours per week, with opportunities to influence across product

Qualifications

• 7+ years of experience as a product designer, design lead, or front-end design engineer at a product- or design-led company.
• Hands-on prototyping: build web prototypes in code or with AI-native tools.
• Strong grounding in user-centered design and rapid prototyping.
• Clear, constructive design feedback and ability to set direction.
• Commitment to 40 hours/week.

Responsibilities

• Partner with AI researchers to derive UI/UX patterns and define design principles.
• Build polished, interactive web prototypes in code or AI-native tools.
• Review AI-generated interfaces and give concrete feedback on layout and motion.
• Explore diverse visual styles and animation approaches across product categories.
• Collaborate with designers and researchers to raise quality standards.

Skills

Senior-level judgment

Prototyping—code

Written communication

40-hour availability

Feedback delivery

Tools

HTML/CSS/JS

React

Tailwind

Cursor

v0 Lovable Bolt Framer

Job description

Cincinnatus LLC is seeking senior product design professionals to help define great UI/UX for AI-driven web and game interfaces. You will work with researchers to establish core design principles and prototype polished interfaces using code or AI-native tools, delivering actionable feedback and advancing design standards.

The role emphasizes hands-on prototyping, strong user-centered design grounding, and the ability to engage 40 hours per week, with opportunities to influence across product