Kilian Valkhof is a seasoned developer who has been building tools for developers for over a decade. He is the founder of Polypane, a browser for developers designed to help build websites with a focus on responsive design, user experience, and accessibility.

Kilian has been developing websites for two decades, with an emphasis on user experience, accessibility and web standards and has a long-standing interest in responsive design, dating back to 2008 when he wrote his first article on mobile web design and foresaw what media features would soon enable. Kilian shares his knowledge and experience through his blog, kilianvalkhof.com and elsewhere on the web, and as a member of the Electron governance team and an open source contributor.