John Koster is currently a Principal Engineer at Amazon, a position they have held since 2022. Previously, from 2013 to 2015, they served as a Software Development Engineer, progressing to Senior Software Development Engineer, in the Advertising Measurement and Data Science department at Amazon. Koster earned a Ph.D. in Physics from the University of Illinois at Urbana-Champaign, where they were also a Research Assistant from 2004 to 2010. Prior to their time at Amazon, Koster worked as a Postdoctoral Fellow at Brookhaven National Laboratory from 2010 to 2013, and they completed a B.A. in Physics and Mathematics at Bowdoin College.
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