Maaret Pyhäjärvi is a tester, extraordinary specialized in breaking illusions about software through means of exploratory testing. She is a software specialist with soft spots for hands-on testing, helping teams grow and building successful products and businesses. She identifies as an empirical technologist, a tester and a programmer, a catalyst for improvement, a speaker and an organizer. She works with a small product development team at Granlund Oy and teaches testing as her side job. She is the author of “Mob Programming Guidebook” and a regular blogger at http://visible-quality.blogspot.com.