Founding Product Designer

Wintermeyer Ventures; San Mateo (CA); On-site; USD 130,000 - 160,000; Full time

Job summary

Wintermeyer Ventures is seeking a founding product designer to own the end-to-end experience for our contributor platform. You will work closely with the founding team and engineers, shaping the product while shipping interface improvements directly to production.

You will identify usability issues, craft clear user flows, build a design system, and ship frontend changes using React/TypeScript with Figma design tools in a startup AI environment.

Qualifications

• 1–2 years of product or UX design experience, including internships.
• Strong design taste and high iteration speed, able to test multiple concepts.
• Experience in a startup, ideally AI/tech, and shipping frontend/UI changes.

Responsibilities

• Identify usability issues and design, build, and ship solutions across the contributor platform.
• Create clear user flows and interfaces for non-technical contributors.
• Translate new project requirements into intuitive product experiences with the team.
• Build and evolve the product’s design system, reusable components, and visual language.
• Use AI coding tools to implement frontend changes within the existing product infrastructure.
• Prototype quickly, observe user behavior, and iterate on designs and experiments.
• Improve product craft and usability across loading/empty states, responsiveness, copy, and edge cases.

Skills

UX design

Design iteration

Frontend implementation

React familiarity

TypeScript familiarity

HTML/CSS

Figma

AI coding tools familiarity

Tools

Figma

HTML

CSS

React

TypeScript

Job description

About the Role

As the founding product designer at an early-stage AI data company, you will own the end-to-end experience for a platform that helps contributors complete complex data tasks. You will work closely with the founding team and engineers, shaping the product experience while shipping interface improvements directly to production.

What You’ll Do

• Identify usability issues and design, build, and ship solutions across the contributor platform.
• Create clear user flows and interfaces that help non-technical contributors understand task requirements.
• Translate new project requirements into intuitive product experiences in collaboration with the team.
• Build and evolve the product’s design system, reusable components, and visual language.
• Use AI coding tools to implement frontend changes with the existing product infrastructure.
• Prototype quickly, observe user behavior, and iterate on designs and experiments.
• Improve product craft and usability across loading and empty states, responsiveness, copy, and edge cases.

What We’re Looking For

• One to two years of product or UX design experience, including internships, and experience designing consumer-facing products.
• Strong design taste, high iteration speed, and comfort exploring multiple concepts and testing alternatives.
• Experience in a startup environment, ideally at an early-stage AI or technology company.
• Ability to take designs beyond handoff and ship frontend or UI changes to production.
• Familiarity with React, TypeScript, HTML, and CSS, along with Figma.
• Experience using AI coding tools such as Cursor, Claude Code, or Codex to make frontend changes.
• Authorization to work without visa sponsorship.

Compensation & Benefits

Base salary is $130,000 to $160,000 annually. Visa sponsorship is not available.

Location

On-site in San Mateo, California.