Jeff Langr is a highly experienced software development professional, coach, mentor, trainer, author, and leader. He has been building software professionally since 1982 and has worked in various development roles, including systems analyst, architect, project manager, consultant, business analyst, and tester. With a BS in Computer Science and a High school diploma in Biological sciences both from the University of Maryland and Eleanor Roosevelt Senior High School, respectively, Jeff has a deep understanding of software development and programming languages such as Java, C++, C#, Smalltalk, and Clojure. Jeff is also an expert in Test Driven Development (TDD), Agile methodologies such as Scrum, XP, BDD, Agile Coaching, Programming, Design, and Mob Programming.

Jeff has authored several books, including Pragmatic Unit Testing with Java and JUnit, Modern C++ Programming with Test-Driven Development, Agile in a Flash, Agile Java: Crafting Code With Test-Driven Development, and Essential Java Style. He has also contributed to other notable software development books such as Uncle Bob Martin's Clean Code.

Jeff is the owner of Langr Software Solutions, Inc. and has worked previously as a developer at Outpace Systems Inc., a Software Engineer at GeoLearning, Senior Principal at Sabre Holdings, Manager at Ezenia!, Consultant at HEB, and Object Mentor, professional services consultant at ChannelPoint, Sr. Staff Member at MCI, Programmer/Analyst at Marriott (Host/Travel Plazas), Programmer/Systems Analyst at Archdiocese of Baltimore, Programmer at American Institutes for Research, and Consultant at Federal Energy Regulatory Commission.

As a member of the Technical Advisory Board at The Pragmatic Programmers, Jeff shares his software development expertise through various publications and speaking engagements at conferences and user group meetings.