I'm a UX professional with 20+ years of experience shaping the design, information architecture, and usability of web and mobile products used by over a billion people. I'm the author of 101 UX Principles and a contributor to .net magazine and Econsultancy. With a strong background in mobile, enterprise, and consumer software, I focus on solving user problems through thoughtful, impactful design. I trained with Jakob Nielsen and Bruce Tognazzini at the Nielsen Norman Group, the global leaders in usability.