Marc Posth
Staff Developer at Shopify
Montreal, Quebec, Canada
Summary
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RockstarMarc Posth is a Staff Developer at Shopify with 11 years of experience building user-focused web applications and B2B checkout systems. He progressed through developer and senior roles at Shopify since 2018, driving customer segmentation, pricing, and merchant checkout features at scale. A front-end specialist, Marc contributes to high-profile open-source work on Shopify Polaris—adding component features and improving UI behavior and tabular displays. His background includes modern TypeScript/Angular work at Desjardins and earlier full-stack web roles, giving him strong grounding across design systems, testing, and front-end architecture. Colleagues know him for shipping pragmatic UI improvements that reduce cognitive load for end users while keeping components robust and well-tested. Based in Montreal, he blends product-focused engineering with steady open-source contributions to widely used design tooling.
11 years of coding experience
7 years of employment as a software developer
English, French, Spanish
Github Skills (17)
typescript10
carbon-design-system10
system-design10
component-library10
typescript-types10
typescripts10
react10
modals9
modal-dialog9
modal-windows9
jtest8
polaris8
jestjs8
javascript8
jes8
Programming languages (2)
Github contributions (5)
Shopify/polaris
Mar 2019 - Apr 2020
Shopify’s design system to help us work together to build a great experience for all of our merchants.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:9 commits, 11 PRs, 124 pushes in 1 year 1 month
Contributions summary:Marc primarily contributed to the UI of the Shopify Polaris design system. Their work included adding new functionality to existing components such as the `Modal` and `Tag` components, as well as addressing related test cases. The user implemented new features like the `onScrolledToBottom` prop for the `Modal` component and the `onClick` prop for the `Tag` component. Additionally, they made code changes to enhance the display of tabular data.
shopifymerchantsreactvscode-extensiongreat
posth/react-youtube
Jan 2017 - Sep 2017
Contributions:9 PRs, 34 pushes, 17 branches in 8 months
reactyoutubereact-reduxreduxlistings
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