Christos Christodoulou is a Machine Learning Engineer and PhD candidate in the Department of Communication and Internet Studies at the Cyprus University of Technology. His research primarily focuses on Machine Learning and Deep Learning, with an emphasis on Graph Neural Networks for recommender systems. Christos has contributed to several European Union-funded research projects, such as DEMOTEC and EUt-Extras, demonstrating his involvement in cutting-edge academic work from the outset of his career. He holds a Master’s degree in Data Science and Engineering and brings many years of extensive industry experience, where he has successfully led the development of end-to-end real-world applications. Notably, he led the creation of Balabook, a new user experience and AI-driven accounting SaaS application. Driven by a passion for leveraging advanced machine learning techniques, Christos is dedicated to solving real-world problems and pushing the boundaries of technology through both his research and professional endeavors.