Jarred Stelfox
Staff Software Engineer at Foxtail media Photography
California, United States
Summary
👤
Senior🎓
Top SchoolJarred Stelfox is a Staff Software Engineer based in California with nine years of hands-on experience building full-stack web platforms and leading large-scale projects, currently driving engineering at iFixit. He blends pragmatic backend expertise in PHP, SQL and C# with modern frontend work in React and deployment on AWS/Vercel, and has led multi-million dollar integrations with external developer ecosystems. An active open-source contributor, Jarred has improved PHP type safety and the widely-used Psalm static analysis tool—work that highlights his focus on code quality, tooling, and static analysis. He mentors teams, reviews code for maintainability, and pairs engineering leadership with a practical maker’s mindset (and a well-documented caffeine habit).
9 years of coding experience
9 years of employment as a software developer
Bachelor of Science (B.S.), Software Engineering, Bachelor of Science (B.S.), Software Engineering at Cal Poly San Luis Obispo
English, Japanese
Stackoverflow
11reputation
2kreached
1answer
0questions
Github Skills (17)
type-inference10
static-analysis10
sa10
enums10
security10
typehinting10
security-testing10
php10
type-checking10
ps10
security-scan10
testing9
html6
google-chrome6
css6
Programming languages (9)
Github contributions (5)
myclabs/php-enum
Feb 2020 - Feb 2020
The enum PHP is missing, inspired from SplEnum
Role in this project:
Back-end Developer
Back-end DeveloperContributions:11 commits, 2 PRs, 4 comments in 7 days
Contributions summary:Jarred primarily focused on enhancing the codebase's type safety and improving developer tooling within the `php-enum` repository. They added and refined Psalm types to eliminate errors, and adjusted code to satisfy the static analysis tool. The user also updated the code to accommodate static analysis requirements, which suggests an emphasis on code quality and maintainability. Further modifications included marking methods as pure and working around Psalm's limitations, demonstrating a detailed understanding of static analysis tools and their impact.
phpmissingphp-enumphp7enum
vimeo/psalm
Feb 2020 - Aug 2020
A PHP static analysis tool for finding errors and security vulnerabilities in PHP applications
Role in this project:Back-end Developer
Back-end DeveloperContributions:5 commits, 6 PRs, 25 comments in 5 months
Contributions summary:Jarred primarily contributed to the PHP static analysis tool, Psalm. Their work included allowing plugins to reuse test configuration files, renaming functions, and fixing issues related to the template checker. The user also addressed a bug regarding `echo false` and implemented a casing checker to ignore function calls. These contributions indicate a focus on improving the tool's functionality, testability, and accuracy.
security-analysisfindingphptaint-analysisphp-applications
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