Nicolas Kourtellis is Head of the Systems AI Lab (SAIL) and Co-Director of Telefonica Research, in Barcelona. He holds a PhD in Computer Science & Engineering from the University of South Florida, USA (2012) and has over 90 published peer-reviewed papers and 6 filed patents. Currently, he focuses on privacy-preserving AI and federated learning on the edge, modeling/detecting with AI user online privacy leaks, as well as inappropriate/fraudulent behavior on social media. He has served in many technical committees of top conferences and journals and presented his work in top academic and industrial venues including Mobile World Congress 2021 and 2023 and Apache Big Data. His work has been covered by major news outlets such as Nature, New York Times, The Atlantic, New Scientist, Washington Post, Wired, and others. In 2022, he was ranked among the World’s Top 2% Scientists (2021) in the list prepared by Elsevier BV, Stanford University, USA