Westin Wrzesinski
Senior Staff Software Engineer at Shopify
Chicago, Illinois, United States
Summary
🤩
Rockstar🎓
Top SchoolWestin Wrzesinski is a Senior Staff Software Engineer with 11+ years building high-performance web platforms and SDKs, currently leading engineering work at Shopify after heading PayPal’s SDK efforts that power billions of monthly button renders. A polyglot focused on the JavaScript ecosystem, he’s led Node.js and React architectures, designed APIs across Node, Python (FastAPI), Rails and Java, and built a rich text editor and WebGL-based mapping/analytics tools. He combines hands-on engineering with team building and mentorship—having started component libraries, run JavaScript guilds, and taught React broadly at Slalom. Westin is an active open-source contributor, improving PayPal checkout components and hardening cross-domain libraries like zoid and post-robot. He’s curious about type systems and functional programming (often in OCaml) and brings that language-aware rigor to pragmatic production systems. Based in Chicago, he’s equally comfortable driving SDK strategy at scale and diving into low-level rendering or type-driven design.
11 years of coding experience
13 years of employment as a software developer
Engineering Computer Science, Engineering Computer Science at University of Illinois Chicago
Stackoverflow
41reputation
3kreached
0answers
1question
Github Skills (24)
conventional-commits10
javascript10
react-components10
es6-promise10
css10
responsive-design10
ui-design10
react-component10
uid10
component-kit10
front-end-development10
react10
testing9
cicd9
webpack9
Programming languages (6)
Github contributions (5)
krakenjs/post-robot
Aug 2021 - Nov 2022
Cross domain post-messaging on the client side using a simple listener/client pattern.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:2 reviews, 30 commits, 15 PRs in 1 year 3 months
Contributions summary:Westin primarily focused on improving the project's tooling and infrastructure. They set up tooling for code coverage, changelogs, and conventional commits. Additionally, the user updated dependencies, including upgrading to grumbler-scripts v5. They also moved the project to the @krakenjs scope and updated the project's dependencies to the new scope.
post-messagingpostmessagingpopup-messagingclient-sidelistener
paypal/paypal-checkout-components
Sep 2021 - Nov 2022
please submit Issues about the PayPal JS SDK here: https://github.com/paypal/paypal-js/issues
Role in this project:Front-end Developer
Front-end DeveloperContributions:41 reviews, 59 commits, 32 PRs in 1 year 2 months
Contributions summary:Westin focused on enhancing the user interface and improving the functionality of the PayPal checkout components. They made changes to button styles, particularly concerning hover states for touch input devices, and implemented responsive design adjustments by hiding the menu button on smaller screens. Their contributions included adding a new menu placement style prop to customize the dropdown menu's position on the PayPal button. The user also upgraded packages and made minor code modifications.
paymentsreactiframejavascriptcheckout
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