Ruben Weytjens is a Belgian computer scientist and a key figure in the field of decentralized artificial intelligence (AI) and Federated Learning. He is primarily known for his contributions to privacy-preserving machine learning and his work on making AI more accessible and collaborative. Weytjens’ research often centers around addressing the challenges of training AI models on sensitive or distributed datasets. In traditional machine learning, data is typically centralized in a single location, which raises concerns about privacy, security, and regulatory compliance. Federated Learning, a technique he actively promotes and develops, offers a solution by enabling model training directly on decentralized devices or servers, without sharing the raw data. This approach significantly reduces privacy risks and allows for the utilization of valuable data that might otherwise be inaccessible. His work extends beyond theoretical frameworks to practical implementations and open-source tools. He is a strong advocate for open science and believes in making research findings and software readily available to the community. This commitment has led to the development of libraries and platforms that facilitate the adoption of Federated Learning by researchers and practitioners. These tools often incorporate differential privacy mechanisms, which add carefully calibrated noise to the learning process to further protect the confidentiality of individual data points. Weytjens is also involved in exploring the applications of decentralized AI in various domains, including healthcare, finance, and smart cities. In healthcare, for example, Federated Learning can be used to train diagnostic models on patient data from multiple hospitals without compromising patient privacy. In finance, it can enable the development of fraud detection systems using transactional data from different banks in a secure and collaborative manner. The potential impact of these applications is substantial, as they can lead to more effective and personalized services while respecting individuals’ privacy rights. Beyond his technical contributions, Weytjens is an active member of the research community. He frequently presents his work at academic conferences and workshops, contributing to the dissemination of knowledge and fostering collaboration among researchers. He also participates in initiatives aimed at educating the public about the benefits and challenges of AI, emphasizing the importance of responsible AI development and deployment. His focus on decentralization stems from a belief that AI should not be controlled by a small number of powerful entities. He advocates for a more democratic and inclusive approach to AI development, where data ownership and control remain with individuals and organizations. By empowering individuals and fostering collaboration, he aims to create an AI ecosystem that is more equitable, transparent, and beneficial to society as a whole. In summary, Ruben Weytjens is a leading voice in the field of decentralized AI and Federated Learning. His work is characterized by a strong emphasis on privacy, collaboration, and accessibility, and he is dedicated to making AI a force for good in the world. His contributions are shaping the future of AI and paving the way for a more secure, collaborative, and inclusive AI ecosystem.