Product Designer at Series B backed AI startup

Jack & Jill
Jack & Jill

Software Engineering, Product, Design, Data Science · Full-time

San Francisco, CA, USA

Posted on Sep 3, 2026
This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.

She will pick the best candidates from Jack's network.

The next step is to speak to Jack.

Job Title

Product Designer

Salary

Not Disclosed

Company Description

Series B backed AI startup

Job Description

Join a high-growth AI startup building foundational models for real-time human interaction. As a Product Designer, you will architect a scalable design system from the ground up before transitioning to lead specific product areas. You'll blend exceptional visual craft with technical fluency to define how humans interact with next-generation AI agents.

Location

San Francisco, USA

Why this role is remarkable

  • Lead the design of a novel interaction layer for human-like AI agents.
  • Join a well-funded Series B startup backed by top-tier global venture capital firms.
  • Transition from design system architecture to owning critical product domains in a high-growth environment.

What You Will Do

  • Architect and consolidate a comprehensive, distinctive design system including tokens and components.
  • Elevate the visual identity through exceptional typography, color, and motion design patterns.
  • Partner deeply with frontend engineering teams to ensure high-fidelity implementation and system scalability.

The ideal candidate

  • Over 6 years of product design experience with a track record of architecting design systems at scale.
  • Exceptional eye for detail and craft, with specialized skills in motion and visual design.
  • Proven ability to thrive in fast-paced startup environments and navigate ambiguous product challenges.

Who are Jack & Jill?

Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.

And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.

How does this work?

  • Jack's an AI agent for job searching and career coaching. He works for you.
  • Jill is the AI recruiter working for the company. She recruits from Jack's network.
  • If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.

We never post fake jobs

This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.

Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.

We appreciate this can make them look a bit suspect, but there isn't much we can do about it.

Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.