Maaret Pyhäjärvi is a tester extraordinaire specializing 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. Maaret is also a serial volunteer for different non-profits driving forward the state of software development. She’s currently the chairman of Software Testing Finland ry, the main organizer for Agile Finland ry’s Tech Excellence Finland Meetup and the head organizer for European Testing Conference, aiming to change the world of non-profits and conferences to be more sustainable than pure volunteer organizations can ever be.