Sandi Ljubić, PhD., is a researcher in the field of Human-Computer Interaction (HCI). He received his PhD at the University of Zagreb, Faculty of Electrical Engineering and Computing. His research interests and efforts are focused on mobile HCI, predictive modeling and evaluation, text entry systems, usability engineering, and empirical approach to HCI issues. He currently holds the position of assistant professor at the University of Rijeka, Faculty of Engineering (RITEH), and is presently the Head of Section of Software Engineering. He is a member of ACM and ACM-SIGCHI.