Jeff Welch
Software Engineering Manager at Onnit
Austin, Texas, United States
Summary
🤩
Rockstar🎓
Top SchoolJeff Welch is a seasoned software engineering manager in Austin with 15 years of experience building and operating large-scale, production systems across web, desktop, and automation domains. He progressed from hands-on engineering and CTO roles to leading teams at Onnit, where he transformed ad-hoc AWS setups into automated CI/CD containerized platforms and drove site-wide performance and scalability improvements. A pragmatic leader and mentor, he combines incident response and security postmortems with long-term architectural improvements that enabled record traffic and sales. Jeff is an active open-source contributor to prominent PHP testing and tooling projects (notably PHPUnit and related libraries), demonstrating deep expertise in test automation, mocking, and code-coverage tooling. He pairs strong software design and refactoring skills with practical delivery—having built cross-platform products and a company-wide framework that lowered development costs and scaled hosting to hundreds of thousands of sites. Comfortable at the intersection of engineering, operations, and product, he brings an operator’s mindset to shipping reliable, maintainable systems.
15 years of coding experience
21 years of employment as a software developer
Computer Science, Business Administration, Computer Science, Business Administration at Texas A&M University-Corpus Christi
Github Skills (35)
unit-testing10
mockk10
apidoc10
testing10
test-framework10
object-oriented-programming10
refactor10
phpunit10
php10
mocks10
api10
exception-handling10
mocker10
mocking10
code-coverage10
Programming languages (7)
Github contributions (5)
sebastianbergmann/phpunit-documentation
Jan 2011 - Jan 2015
Documentation for PHPUnit.
Role in this project:
Technical Writer
Technical WriterContributions:146 commits, 10 PRs, 16 pushes in 4 years
Contributions summary:Jeff primarily focused on enhancing the documentation for the PHPUnit project. Their contributions included adding and modifying documentation files, specifically for different versions and languages. The user adapted the documentation to use Bootstrap 3, updated the styling, and fixed encoding issues, improving the overall presentation and clarity of the documentation. The user also fixed rendering of notes, warnings and cautions.
phpphpunit
sebastianbergmann/exporter
Feb 2013 - Sep 2014
Provides the functionality to export PHP variables for visualization
Role in this project:Back-end Developer
Back-end DeveloperContributions:44 commits, 1 push, 2 comments in 1 year 7 months
Contributions summary:Jeff primarily refactored and updated the code within the `sebastianbergmann/exporter` repository. They renamed and restructured various files, including the `Exporter` and `ExporterContext` classes, improving code organization. Furthermore, the user removed the static interface and added state to `PHP_Exporter\Exporter` objects to improve the design. These changes suggest a focus on improving the maintainability and clarity of the codebase.
phpexportvariablesvisualization
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