Paul Davis (formerly known as Paul Barton-Davis) is a British-American software developer best known for his work on audio software (JACK) for the Linux operating system, and for his role as one of the first two programmers at Amazon.com. Davis grew up in the English Midlands and in London. After studying molecular biology and biophysics, he did post-graduate studies in computational biology at the Weizmann Institute of Science in Rehovot and EMBL in Heidelberg. He is also an ultra-marathon runner and touring cyclist.