Jeff Gothelf has spent a 15-year career as an interaction designer, Agile practitioner, team leader, blogger, and teacher. He is one of the leading voices on the topic of Agile UX and Lean UX. In addition, Mr. Gothelf is the author of the upcoming O'Reilly book (2013), Lean UX: Applying Lean Principles to Improve User Experience. He is a highly sought-after international speaker, having presented at Interactions, UX LX, UX London, EuroIA, SXSW, IA Summit, the Agile conference, andStartup Lessons Learned. Mr. Gothelf has led cross-functional product design teams at TheLadders, Publicis Modem, WebTrends, Fidelity, and AOL, while maintaining a strong advisory and mentorship presence in the startup communities of New York City and Silicon Valley. In 2012, Mr. Gothelf launched Proof, a product design and innovation studio that combines lean processes with strategy, design, and technology that has since been acquired by Neo.com, where he is now Managing Director.