Seth Westphal
Lead Software Engineer at fetch-rewards
Madison, Wisconsin, United States
Summary
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RockstarSeth Westphal is a Lead Software Engineer based in Madison, WI with 15 years of experience building full-stack systems and shipping reliable software. He blends hands-on engineering with entrepreneurial drive as founder of Westy92 LLC and Checkiday while leading engineering at Fetch Rewards. An active open-source contributor, Seth has improved TypeScript definitions for the high-profile DefinitelyTyped repo—enhancing Chrome DevTools Protocol types—and contributed to flutter_markdown and PHPFastCache, showing fluency across front-end rendering, back-end caching, and type-safe tooling. He’s comfortable navigating both code maintenance and feature work, from tightening markdown parsing to adding event-driven APIs and send methods in library typings. Known for pragmatic clarity in documentation and tests, Seth brings a developer-first mindset that helps teams ship maintainable, well-documented systems.
15 years of coding experience
Stackoverflow
20,155reputation
4.9mreached
86answers
10questions
mysql
top-5%
sql
top-5%
android
top-5%
browser
top-5%
typescript
top-5%
php
top-5%
Github Skills (35)
markdown10
caching10
chrome-devtools-protocol10
flutter-apps10
testing10
typescript10
typescript-definitions10
type-definition10
php10
markdown-it10
typescript-types10
flutter-game10
typescripts10
dart10
disk-cache10
Programming languages (20)
Github contributions (5)
DefinitelyTyped/DefinitelyTyped
Aug 2016 - Feb 2022
The repository for high quality TypeScript type definitions.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:21 reviews, 25 commits, 19 PRs in 5 years 7 months
Contributions summary:Seth significantly contributed to improving the TypeScript type definitions within the `definitelytyped/definitelytyped` repository, specifically for the `chrome-remote-interface` library. Their work included adding missing types, improving existing ones, and adding new features like event promises and callbacks. The user also introduced the `send` method and made other enhancements, with their contributions reflecting a strong understanding of the library's structure and TypeScript. This work directly benefits developers who use Chrome DevTools Protocol.
typescript-definitionstype-definitionshigh-qualitydtsdefinitions
PHPSocialNetwork/phpfastcache
Apr 2016 - Jan 2017
A high-performance backend cache system. It is intended for use in speeding up dynamic web applications by alleviating database load. Well implemented, it can drops the database load to almost nothing, yielding faster page load times for users, better resource utilization. It is simple yet powerful.
Role in this project:Back-end Developer
Back-end DeveloperContributions:6 commits, 3 PRs, 2 comments in 9 months
Contributions summary:Seth primarily focused on code maintenance and documentation improvements within the PHPFastCache project. They made minor changes, including adding closing tags and fixing typos in PHP files. Additionally, they improved documentation, indicating a commitment to code clarity and usability for other developers. This suggests a role focused on maintaining the project's codebase.
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