Colin Lohner
Sr. Design Technologist (Design Systems Engineer) at DoorDash
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolColin Lohner is a Sr. Design Technologist and Design Systems Engineer with a decade of experience building scalable front-end systems from startups to large platforms in the San Francisco Bay Area. Currently at DoorDash after shaping design systems at Segment, he focuses on translating visual design into robust, reusable component libraries and developer-friendly APIs. His open-source contributions include practical improvements to Segment’s popular Evergreen React UI framework—upgrading dependencies, fixing tooltips, and expanding the icon system—demonstrating attention to detail in shared UI tooling. As a former co-founder and long-time front-end engineer, he blends product-driven thinking with hands-on implementation across React ecosystems. Trained in graphic design at the University of Utah, he brings a strong visual sensibility that informs accessible, polished interfaces. Collected experience across marketplaces, fintech, and startup infrastructure gives him a knack for shipping pragmatic design system solutions that scale.
10 years of coding experience
11 years of employment as a software developer
The University of Utah
English, German
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (12)
javascript10
component-library10
react10
ui-components10
system9
typescripts8
typescript8
testing8
typescript-types8
iconsets7
icon-pack7
app-icon7
Programming languages (3)
Github contributions (5)
segmentio/evergreen
Mar 2020 - Mar 2021
🌲 Evergreen React UI Framework by Segment
Role in this project:
Front-end Developer
Front-end DeveloperContributions:13 releases, 85 reviews, 125 commits in 11 months
Contributions summary:Colin primarily contributed to the UI framework by upgrading dependencies like `ui-box`, fixing tooltip components, and adding new icons. They updated and added code across different components within the `src` directory, including stories, and test files. Their work involved modifications to the icon system, incorporating new icons, fixing errors, and resolving issues related to prop passing within the components.
react-ui-frameworkreactevergreenui-frameworkdesign-system
TrainingManagementSystem/Trax
Apr 2016 - May 2016
Contributions:129 commits, 79 PRs, 120 pushes in 16 days
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