Steph HuynhAs a founding member, Steph didn't just help build the product, she shaped the foundation of the team and the culture around it. She brings strong design and product instincts, and a rare ability to turn ideas into polished, practical outcomes.
● Intro
Open to work
UX Engineer Where product UI, design systems, and frontend engineering meet.
I build the systems and the UI on top of them, including Superbloom, the design system behind this site. I was founding UX Engineer at Mermaid (employee #4, through Mar 2026). Before that, Microsoft FAST. Seven years shipping production UI on small teams.
● About
I work across design systems and frontend on small teams where design, product, and engineering overlap. That is the environment where I do my best work.
I was founding UX Engineer at Mermaid (employee #4) from 2023 to March 2026: product design, frontend, and the design system from zero to production. Before that, contract work at Microsoft FAST on documentation and integration guides.
I use AI for the mechanical work so I can stay on scope, judgment, and how things should feel.
When I can, I contribute in open source: 100+ across Mermaid.js, Microsoft FAST, and San Diego Tech Hub, mostly docs, components, and developer experience.
- 7
- years shipping production UI
- 2
- design systems launched 0-to-1
- 23
- components shipped to production
- 100+
- open-source contributions
Skills
What I do
Product designFrontend engineeringDesign systemsPrototypingDocumentationDeveloper experience
Tools & AI
FigmaStorybookArgosChromiumCursorClaude Code
Stack
SvelteKitReactNext.jsTypeScriptTailwindshadcn/ui
Recent Work
● Recent Work
See more work →
Mermaid · Product & design system
Mermaid · Founding UX Engineer · Jan 2023 to Mar 2026
Designed the product UI and built the design system, Storybook, and docs site from zero as founding UX Engineer.
Product designDesign systemStorybook0-to-1
Read case study
Microsoft FAST · Documentation
Microsoft FAST · UX Engineer (contract) · Nov 2021 to Jun 2022
Wrote integration guides and managed Docusaurus infrastructure for the FAST web components library.
Web componentsDocsDocusaurusOpen source
Read case study
Superbloom
● Superbloom
Live
The design system behind this site.
Superbloom is the component library I built for this portfolio: tokens, patterns, Storybook, and docs in the same repo. Every page here is composed from it.
Built in the open and shipping with the site today.
Recent Posts
● Recent Posts
See more posts
Superbloom · CI & Storybook
Visual regression for Superbloom · June 2026
Argos screenshot testing on every pull request: Storybook stories in light and dark mode, CI workflow, and review before merge.
Design systemsStorybookVisual testingCI
Read post
Portfolio · Lighthouse audit
Portfolio Lighthouse report · May 8, 2026
Production Lighthouse run on the homepage: 100 across Performance, Accessibility, Best Practices, and SEO, plus the fixes that got there.
PerformanceAccessibilitySEOSvelteKit
Read post
From the Mermaid team
● From the Mermaid team
Read Mermaid case studySteph has a knack for creating great user experiences! Not only has she designed (and re-designed!) entire sites and user-flows, but she built up a culture of strong UX design with reusable components and internal processes.
Steph is passionate about her work, focuses on quality and is good at communicating and collaborating with team members. In addition to her skills as a UX Engineer, I really liked her ambition to create a good team culture.
Get in touch
● Get in touch
I'm open to full-time, contract, or fractional UX Engineering roles with small teams where design and engineering share the same surface.
Design systems, product UI, and docs. San Diego based, open to hybrid or remote across US and EU time zones.