Matthieu Billon-Lanfrey developed GDPR compliance enhancements for the xcp-ng/xcp-ng-org repository, focusing on unifying user consent management across both documentation and website. He replaced legacy Matomo and Mautic tracking scripts with a single RGPD-compliant JavaScript solution, centralizing consent data flow and streamlining analytics governance. His work included implementing a maintainable cookie banner using HTML and JavaScript, ensuring end-to-end consent validation and cross-site consistency. By consolidating privacy tooling, Matthieu reduced privacy risks and established a scalable foundation for future controls. The project demonstrated depth in front-end development, web development, and GDPR compliance, with changes validated through comprehensive consent flow testing.