Pierre Seifert

Strategic UX leadership across web, mobile and enterprise platforms for millions of users globally. Responsible for UX strategy, design quality governance and enterprise-wide design systems. Leading cross-functional UX teams internationally. AI-supported workflows (ChatGPT, Claude, Cursor) are core daily practice — across ideation, research synthesis, documentation and collaboration.

Cross-platform UX/UI team management across web, mobile, counter displays and back-office products. Responsible for UX quality, design system foundations and corporate design guidelines. Initiation and evaluation of qualitative and quantitative user testing. Management of freelancers and agencies.

Built and scaled the UX/UI team for SIXT web products. Created concepts, wireframes and high-fidelity designs for all web platforms. Established and maintained the online CI and living style guide. Drove user testing in collaboration with the web optimisation team. Managed freelancers and agencies.

Established and led the first dedicated UX/UI team at SIXT. Responsible for UX and UI of the global booking funnel and web platforms. Defined online CI guidelines. Initiated and evaluated qualitative and quantitative user tests with the web optimisation team.

Responsible for UX and UI of the SIXT web platforms including booking funnels. Created concepts, wireframes and high-fidelity screen designs. Defined and updated web design guidelines. Initiated and evaluated qualitative and quantitative user tests.

UX and UI design for the SIXT web platforms. Created concepts, wireframes and high-fidelity screen designs. Frontend implementation using HTML, CSS and JavaScript.

Conception, design and development of websites and multimedia applications. Frontend development with HTML, CSS and JavaScript. CI development for PROREC GmbH. Management of EU- and government-funded research projects. Lecturer for web design, frontend development and digital media.

Multimedia / Produktion / Multimediatechnik