With a long history of contributing to open source browser engine development, Jan began working on Gecko in its early days, initially focusing on DOM and layout, and later spent roughly a decade specializing in storage systems in browsers, particularly within Gecko.

Over the years, he has worked across the browser stack, from low-level infrastructure to web-exposed APIs, touching areas related to performance, reliability, and standards compliance.

Jan is passionate about improving the web platform through open collaboration and thoughtful engineering with a strong attention to detail.