Matthias Mullie
Staff Software Engineer at Wikimedia Foundation
West Flanders, Belgium
Summary
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Rockstar🎓
Top SchoolMatthias Mullie is a Staff Software Engineer based in West Flanders, Belgium, with 15 years of experience building scalable web applications across PHP, Python, MySQL and JavaScript. He combines hands-on implementation and systems architecture—having shipped cross-wiki notifications, media search and transactional caching at Wikimedia—with a pragmatic focus on clean, maintainable code and the Boy Scout rule. An active open-source maintainer, he’s driven improvements to notable projects like MediaWiki and Fork CMS and authored a popular PHP CSS/JS minifier, demonstrating both performance and tooling expertise. Matthias thrives on hard technical challenges, from low-level optimizations to reactive frontends, and has led and mentored engineering teams while keeping delivery practical. Outside work he balances curiosity with discipline—he’s an avid traveler, soccer player and runner—which fuels his steady appetite for learning new technologies.
15 years of coding experience
4 years of employment as a software developer
IT Management, IT Management at Sint-Amandscollege KortrijkLatin-Math, Latin-Math at Spes Nostra HeuleBachelor Applied Computer Science, Bachelor Applied Computer Science at Katho KortrijkPHP developer, PHP developer at VDAB
Dutch, English, French, German
Stackoverflow
2,073reputation
604kreached
53answers
0questions
mysql
top-5%
php
top-5%
google-maps
top-5%
Github Skills (43)
algorithm10
unit-testing10
code-optimization10
algorithms10
cms10
mediawiki10
back-end-development10
wikipedia10
testing10
amazon-elasticsearch10
software-quality10
minify10
minification10
regular-expression10
elasticsearchquery10
Programming languages (8)
Github contributions (5)
matthiasmullie/minify
Oct 2012 - Jan 2023
CSS & JavaScript minifier, in PHP. Removes whitespace, strips comments, combines files (incl. @import statements and small assets in CSS files), and optimizes/shortens a few common programming patterns.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:48 releases, 2 reviews, 435 commits in 10 years 4 months
Contributions summary:Matthias's commits primarily focused on the development and maintenance of PHP code for a CSS & JavaScript minifier. Their contributions include refactoring existing code to adhere to PSR-0 and PSR-1 standards, adding unit tests, fixing dependencies, and optimizing performance. Furthermore, the user addressed bugs, enhanced features, and implemented improvements for improved code maintainability and efficiency, resulting in a new version release (1.2.0).
jsstripsminifyjs-minifierminifier
forkcms/forkcms
Dec 2010 - Oct 2015
Fork is an easy to use open source CMS using Symfony Components.
Role in this project:Back-end Developer
Back-end DeveloperContributions:550 commits, 3 PRs, 19 comments in 4 years 11 months
Contributions summary:Matthias's commits primarily involve refactoring the installer files for the Fork CMS project. The changes include restructuring the layout of install steps and the handling of language settings, indicating a focus on improving the initial setup process and internationalization support. The code changes also involved fixes regarding the handling of the template and the display of empty pages which are vital to a CMS. These changes suggest the user was involved in improving the project's core functionality and maintainability, likely working on the back-end infrastructure of the system.
cmsphpsymfony-bundleforkcmsfork-cms
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