Jonathan Coronel

Design engineer

I design and build interfaces, with a habit of turning the good parts into reusable pieces. Creator of cubby-ui and SkillBundle.

Email meSee the work
Status
Open to roles
Based in
Los Angeles, CA
Email
joncorone@gmail.com
Elsewhere
GitHubX

Selected work

cubby-ui

A component library you copy in and own.

GitHub

Accessible React components on Base UI and Tailwind v4, with an OKLCH token set and an eight-step surface elevation system.

  • React 19
  • Base UI
  • Tailwind v4
  • Design tokens

SkillBundle

Find, compare, and bundle AI coding-assistant skills.

GitHub

Search a catalog of agent skills, compare them side by side, and curate the ones you want into a bundle that installs with one command. A full-stack build: discovery, auth, and billing.

  • Next.js
  • Convex
  • Search

About

I'm Jonathan, a design engineer in Los Angeles. I care about the small stuff, and I like building things I can use again: components, patterns, little tools.

Creator of cubby-ui, a React component library, and SkillBundle, a place to find and bundle AI coding skills. When neither of those needs me, I'm usually tweaking something that was already fine.

Language
  • TypeScript
Frontend
  • React
  • Next.js
  • Base UI
  • Motion
Styling
  • Tailwind CSS
Backend
  • Convex
  • Node.js

Say hello.

Open to design engineering roles. Email is the best way to reach me.

joncorone@gmail.com