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Mark Learst. Senior Frontend Engineer, Design Systems Architect. Coder to the core, think like a designer. I build accessible React component libraries and design systems that survive production. At General Motors I built Aurora across four brands, hit 60 percent component reuse, and shipped Storybook driven workflows that trained 50 plus engineers and designers. My lane is component architecture, design tokens and theming, accessibility audits and fixes, performance, and tooling that removes friction between Figma and code. Open source with real users: a11y Companion, FigmaVars Hooks, Diabetic Utils. I also work on token governance and handoff contracts so teams stop guessing and start shipping. If you want durable UI foundations, I am your guy.…Mark Learst. Senior Frontend Engineer, Design Systems Architect. Coder to the core, think like a designer. I build accessible React component libraries and design systems that survive production. At General Motors I built Aurora across four brands, hit 60 percent component reuse, and shipped Storybook driven workflows that trained 50 plus engineers and designers. My lane is component architecture, design tokens and theming, accessibility audits and fixes, performance, and tooling that removes friction between Figma and code. Open source with real users: a11y Companion, FigmaVars Hooks, Diabetic Utils. I also work on token governance and handoff contracts so teams stop guessing and start shipping. If you want durable UI foundations, I am your guy.

Mark Learst

Front-End Developer, Product Designer, UI Designer, +2

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Mark Learst. Senior Frontend Engineer, Design Systems Architect. Coder to the core, think like a designer. I build accessible React component libraries and design systems that survive production. At General Motors I built Aurora across four brands, hit 60 percent component reuse, and shipped Storybook driven workflows that trained 50 plus engineers and designers. My lane is component architecture, design tokens and theming, accessibility audits and fixes, performance, and tooling that removes friction between Figma and code. Open source with real users: a11y Companion, FigmaVars Hooks, Diabetic Utils. I also work on token governance and handoff contracts so teams stop guessing and start shipping. If you want durable UI foundations, I am your guy.…Mark Learst. Senior Frontend Engineer, Design Systems Architect. Coder to the core, think like a designer. I build accessible React component libraries and design systems that survive production. At General Motors I built Aurora across four brands, hit 60 percent component reuse, and shipped Storybook driven workflows that trained 50 plus engineers and designers. My lane is component architecture, design tokens and theming, accessibility audits and fixes, performance, and tooling that removes friction between Figma and code. Open source with real users: a11y Companion, FigmaVars Hooks, Diabetic Utils. I also work on token governance and handoff contracts so teams stop guessing and start shipping. If you want durable UI foundations, I am your guy.

Available to hire

Detroit, United States

Mark Learst. Senior Frontend Engineer, Design Systems Architect.
Coder to the core, think like a designer.

I build accessible React component libraries and design systems that survive production. At General Motors I built Aurora across four brands, hit 60 percent component reuse, and shipped Storybook driven workflows that trained 50 plus engineers and designers.

My lane is component architecture, design tokens and theming, accessibility audits and fixes, performance, and tooling that removes friction between Figma and code.

Open source with real users: a11y Companion, FigmaVars Hooks, Diabetic Utils. I also work on token governance and handoff contracts so teams stop guessing and start shipping.

If you want durable UI foundations, I am your guy.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior Frontend Engineer, Design Systems, OSS Maintainer at Self-Employed

September 1, 2024 - Present

Consulting and open source work: Shipped production design systems, accessibility tooling, and watchOS features for clients and public users. Led Skydio Component Library, introduced FigmaVars Hooks, Diabetic Utils, a11y Companion, Variable Contract; built GlucoseIQ watchOS app and Movement Festival Platform.

Senior Design Engineer, Design Systems at General Motors

June 1, 2021 - September 1, 2024

Led and built design systems across 4 GM brands in Storybook, driving 60% component reuse and WCAG 2.1 AA compliance across web and native platforms. Aurora Design System enabled cross-brand reuse; built token governance and automation, and trained 50+ engineers and designers on adoption.

Senior UI Developer at Bottomline Technologies

January 1, 2019 - June 1, 2021

Build System Modernization: automated migration from CommonJS to ES modules, reducing build times by ~50% and improving DX. Integrated AG Grid into React component library; created accessible UI patterns raising WCAG 2.1 AA compliance to 65% and expanding user reach by 20%.

Senior Front-End Developer at CÜR Music Streaming Service

May 1, 2015 - December 1, 2018

Streaming Player Build: built a responsive React streaming player with real-time analytics; Editorial Workflow Tooling: built a React SPA for playlist curation, reducing editorial workflow time by 25%.