Founding Designer

Posted Yesterday
Be an Early Applicant
2 Locations
In-Office
Entry level
Artificial Intelligence • Digital Media • Marketing Tech • Software
The Role
Own product design end to end, including user flows, UI, prototypes, micro-interactions, and design systems. Partner closely with founders, engineering, and growth to create a cohesive video storytelling and editing product. Advocate for users, shape product direction, maintain high visual and interaction quality, and coordinate external creative contributors when needed.
Summary Generated by Built In
About
  • We're building the future of storytelling and video editing.

  • We're a small team that moves fast and builds things we're proud of.

  • We care obsessively about taste: in design, in product, in every detail.

  • We're solving these hard problems.

  • We're backed by a Tier-1 global fund, YC, and founders of billion dollar companies.

Design

Video is the most powerful way humans tell stories. It always has been. But creating it today is still painfully hard. Fragmented tools, steep learning curves, and workflows that get in the way of the actual creative work. We're building Cardboard to change that.

As our founding designer, you'll shape not just how the product looks, but how it works. You think product first and push back when something doesn't serve the user, and think through every user flow before a component gets shipped.

In our team, everyone has incredible speed, taste, and care that they put into their work. You'll often see people coming up with micro-interactions nobody asked for and losing sleep over things that feel slightly off by a sheer two pixels. Your job is to accelerate and harness that energy to make sure everything we build feels cohesive and intentional.

You will
  • Own product design end to end: flows, UI, prototypes, and everything in between.

  • Advocate for the user in every room like a PM does.

  • Work closely with founders, engineering, and growth.

  • Build a design system.

  • Make something people love.

Who you are
  • You have taste.

  • You own things end-to-end.

  • You think like a PM. You notice the extra click, the label doing two jobs, the feature that shipped but isn't really done.

  • AI-pilled and restlessly curious. Rive, Spline, Paper, Reve, Claude design, whatever dropped last week, you've already tried it.

  • You're a Figma expert. You love micro-interactions. You've probably built parts of a design system, or at least felt the pain of not having one.

  • Resourceful. When you need an illustrator, motion designer, or freelancer, you find them and direct them well.

  • Bonus: you vibe coded or shipped a side project.

What you get

You'd be surrounded by people who are absurdly good at what they do. One started coding at 11 and shipped an app with 6M+ downloads in high school. One got into CS engineering at 14 and has been working on distributed systems for 8+ years. One's an ex-founder who took a company to 1.2M users and $300M+ in transactions. That's the team. We're looking for someone who'll raise the bar on the creative side the way we have on the technical and business side. Apart from that you'd get:

  • Competitive salary and founding-team equity.

  • Unlimited tokens. Use whatever you want, as much as you want.

  • A healthy budget for tools, monitors, laptop, and anything you need to do your best work.

 

Share:

 
  1. Your portfolio and resume.

  2. Your favorite product and one sentence on why.

  3. One piece of work that you're proud of.

  4. Optional: if you'd like, record and send us a quick video : )

Skills Required

  • Expert proficiency with Figma
  • Strong product design skills across flows, UI, and prototypes
  • Ability to own design work end to end
  • Strong visual taste and attention to detail
  • Ability to think like a product manager and advocate for users
  • Experience building or contributing to a design system
  • Resourcefulness in finding and directing illustrators, motion designers, or freelancers
  • Experience with micro-interactions
  • Experience using emerging AI and design tools
  • Experience vibe coding or shipping a side project
Am I A Good Fit?
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The Company
5 Employees
Year Founded: 2025

What We Do

Cardboard, Inc. develops an agentic, browser-based AI video editor for growth and marketing teams and serious creators. Users can describe an intended edit in natural language, while the product cuts, captions, reframes, composes, and searches footage. Its browser-native workflow combines a multi-layer timeline, collaboration, auto-captioning, voiceover and music generation, and exports for professional finishing applications, helping teams produce and iterate videos faster.

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