Jan Rosier
Software Engineer at Interstroom informatietechnologie b.v.
Greater Enschede Area Netherlands
Summary
🤩
Rockstar🎓
Top SchoolJan Rosier is a seasoned software engineer with 12 years of professional experience based in the Greater Enschede Area, specializing in backend PHP development and long-term maintenance of enterprise Symfony projects. At Interstroom informatietechnologie he has focused on pragmatic, stability-first improvements—refactoring namespaces, hardening CSRF protection, and modernizing legacy MySQL and Twig integrations to ensure forward compatibility. An active open-source contributor, Jan has improved well-known projects like Symfony Demo, DoctrineBundle and SonataPageBundle, adding tests, fixing edge-case exceptions, and smoothing upgrades across Symfony versions. He holds Zend PHP certification and an engineering degree, combining formal training with a practical knack for making legacy codebases robust and easier to evolve.
12 years of coding experience
University of TwenteZend Certified Engineer, Zend Certified Engineer at Zend PHP 5 CertificationEngineer's Degree, Engineer's Degree at Het Van Hall Instituut
Dutch, English, German
Github Skills (19)
symfony-bundle10
testing10
doctrine10
bundle10
php10
symfony10
symfony-ux10
fixture9
cms9
appbundle9
test-fixtures9
pager9
access-control9
twig9
django-fixtures9
Programming languages (2)
Github contributions (5)
symfony/demo
Apr 2017 - Dec 2022
Symfony Demo Application
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 reviews, 26 commits, 39 PRs in 5 years 8 months
Contributions summary:Jan contributed to the Symfony-based demo application by modifying the codebase to address issues and improve functionality. Their changes included renaming namespaces for consistency, removing unused parameters, and fixing potential exceptions within the form handling. Furthermore, the user implemented CSRF protection for logout URLs and updated data fixtures. They also upgraded PHPStan.
phpsymfony-bundlesymfony-applicationsymfonysymfony-demo
doctrine/DoctrineBundle
Apr 2017 - Nov 2022
Symfony Bundle for Doctrine ORM and DBAL
Role in this project:Back-end Developer
Back-end DeveloperContributions:7 commits, 9 PRs, 7 comments in 5 years 7 months
Contributions summary:Jan primarily contributed to the internal maintenance and improvement of the DoctrineBundle. They addressed legacy code related to MySQL character sets, updated code to support Symfony 3.4 and higher, and fixed deprecation warnings related to Twig. Additionally, the user made changes to PHP documentation and container configurations, refining the project's codebase for stability and forward compatibility.
doctrine-ormbundlesymfony-bundlephpdbal
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