Kent Beck
Kent Beck (born 1961) is an American software engineer and the creator of extreme programming,Beck pioneered software design patterns, as well as the commercial application of Smalltalk. He wrote the SUnit unit testing framework for Smalltalk, which spawned the xUnit series of frameworks, notably JUnit for Java, which Beck wrote with Erich Gamma. Beck popularized CRC cards with Ward Cunningham, the inventor of the wiki.
He lives in San Francisco, California and previously worked at Facebook. In 2019, Beck joined Gusto as a software fellow and coach, where he coaches engineering teams as they build out payroll systems for small businesses. Provided by Wikipedia