Kent Beck is a programmer at Facebook, where he coaches, researches software engineering, and works on infrastructure projects. He is also the founder and director of Three Rivers Institute (TRI). His career has combined the practice of software development with reflection, innovation, and communication. His contributions to software development include patterns for software, the rediscovery of test-first programming, the xUnit family of developer testing tools, and Extreme Programming. He currently divides his time between writing, programming, and coaching. Beck is the author/co-author of Implementation Patterns, Extreme Programming Explained: Embrace Change 2nd Edition, Contributing to Eclipse, Test-Driven Development: By Example, Planning Extreme Programming, The Smalltalk Best Practice Patterns, and the JUnit Pocket Guide. He received his B.S. and M.S. in Computer Science from the University of Oregon.