He has been a visiting researcher at the Swedish Institute of Computer Science (SICS) in Stockholm and a research collaborator at the Institute of Systems and Computer Science of the Italian National Research Council (ISI-CNR). His current research focuses on cloud computing, distributed data mining, service-oriented architectures, social data analysis, energy-efficiency in distributed systems, and peer-to-peer networks. He published three books, Service-Oriented Distributed Knowledge Discovery (CRC 2012), The Internet of Things Based on Smart Objects (Springer 2014) and Data Analysis in the Cloud (Elsevier 2015), and many scientific papers in conference proceedings, edited books and international journals.