Jeff Langr has been professionally building software for over a third century. He is a contributor to Clean Code and the author of 5 books on software development: Pragmatic Unit Testing in Java 8 with JUnit, Modern C++ Programming with Test-Driven Development, Agile in a Flash, Agile Java, and Essential Java Style. Jeff provides consulting and training services through his company, Langr Software Solutions, Inc. He lives in Colorado Springs.