Dean Wampler is a Consultant, Trainer, and Mentor with Object Mentor, Inc. He specializes in Scala, Java, and Ruby. He works with clients on application design strategies that combine object-oriented programming, functional programming, and aspect-oriented programming. He also consults on Agile methods, like Lean and XP. Dean is a frequent speaker at industry and academic conferences on these topics. He has a Ph.D. in Physics from the University of Washington.

Alex Payne is Platform Lead at Twitter, where he develops services that enable programmers to build atop the popular social messaging service. Alex has previously built web applications for political campaigns, non-profits, and early-stage startups, and supported information security efforts for military and intelligence customers. In his free time, Alex studies, speaks, and writes about the history, present use, and evolution of programming languages, as well as minimalist art and design.

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