Welcome to ICKSE 2018 4th International Conference on Knowledge and Software Engineering (ICKSE 2018) will be held in Istanbul, Turkey during March 24-26, 2018. It aims to provide a forum for researchers, practitioners, and professionals from both the industry and the academia to share their newest research findings and results. ICKSE is also the annual meeting of IJKE editorial board, so it also serves to bring authors and editors of IJKE together to communciate face to face and discuss chances for possible cooperation.