Graham Campbell
Principal Software Engineer at Graham Campbell Technology Ltd
York, England, United Kingdom
Summary
🤩
Rockstar🎓
Top School
Top expert inLaravel Ecosystem and Web Application Development
Graham Campbell is a Principal Software Engineer and OSS maintainer with 13 years of experience building and hardening PHP ecosystems, currently running his consultancy Graham Campbell Technology Ltd. He combines a strong academic background—PhD research in pure mathematics and prior EPSRC-funded graph transformation work—with practical engineering, shipping and maintaining production tooling like StyleCI and contributing heavily to high-profile projects such as Laravel, Symfony and Bref (Serverless PHP on AWS Lambda). Comfortable across backend, DevOps and QA, he routinely modernises runtimes, fixes security vulnerabilities, and improves CI/build environments and library compatibility across PHP versions. A prolific contributor, his GitHub history shows deep care for code quality: docblock, PSR fixes, test and CI improvements, and dependency upgrades across dozens of major repos. He’s also presented at conferences (Laracon) and represented companies publicly, blending developer advocacy with hands-on delivery. Not obviously expected from a Principal engineer, he still actively engages in formal research and has recovered theoretical results from his BSc work while applying that rigor to practical software problems.
12 years of coding experience
2 years of employment as a software developer
High School, High School at Durham SchoolBachelor’s Degree, Mathematics and Computer Science, First with Distinction, Bachelor’s Degree, Mathematics and Computer Science, First with Distinction at University of York
English
Github Skills (178)
dependency-management10
url-routing10
amazon-kinesis10
package-management10
abstract-syntax-tree10
testing10
command-line-interface10
http10
authentication10
queuing10
integrations10
refactor10
guzzle10
phpunit10
security10
Programming languages (24)
Github contributions (5)
vlucas/phpdotenv
Oct 2014 - Oct 2022
Loads environment variables from `.env` to `getenv()`, `$_ENV` and `$_SERVER` automagically.
Role in this project:
Backend Developer
Backend DeveloperContributions:62 releases, 401 commits, 281 PRs in 8 years 1 month
Contributions summary:Graham made changes to the PHP source code, focusing on core functionality. They implemented custom exceptions within the codebase, refactored code to use newlines, fixed PHP documentation, and tweaked error messages for better clarity. They also handled the integration of Apache and environment variables and enhanced existing code to support better parsing and variable name handling.
environment-variablesconfigurationphpdotenvenvironment
GitLabPHP/Client
Mar 2018 - Apr 2022
GitLab API v4 client for PHP
Role in this project:Back-end Developer
Back-end DeveloperContributions:44 releases, 85 reviews, 659 commits in 4 years 1 month
Contributions summary:Graham's contributions primarily focused on enhancing the GitLabPHP client library by adding features and improving the codebase. They implemented interfaces for exceptions, added endpoints for commit build statuses, and refactored HTTP client functionality. In addition, they made modifications to support the latest version of the HttpPlug library and updated testing dependencies.
api-clientapigitlab-apihttplugphp
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