Graduate of Mathematics at Poznan University of Technology, Poland. Mathematics tutor with many years of experience. Creator of  'eTrapez' Online Courses, which have gained immense popularity among students in Poland. Krystian is also the author of articles and free resources for students on the 'eTrapez' Blog. He participates in meetings with students at various Universities.

He lives in Szczecin, Poland. He enjoys walks in the woods, beaches and kayaking.