Jeff Gothelf is a Principal at Proof, a product innovation studio that combines lean processes with strategy, design and technology. Jeff has spent a 14 year career as an interaction designer, Agile practitioner, user experience team leader and blogger. He is one of the leading voices on the topic of Agile UX and Lean UX. In addition, Jeff is the author of the upcoming O'Reilly book (2012), Lean UX: Getting Out of the Deliverables Business. He is a highly sought-after international speaker having presented at EuroIA, SXSW, IA Summit, Interaction (IxDA), London IA, the Agile conference and Startup Lessons Learned. Jeff has led cross-functional product design teams at TheLadders, Publicis Modem, WebTrends, Fidelity, AOL while maintaining a strong advisory and mentorship presence in the startup communities of New York City and Silicon Valley.