He has published more than 300 papers in top venues and is co-author of the books Data Mining and Analysis - Fundamental Concepts and Algorithms and Data Mining and Machine Learning - Fundamental Concepts and Algorithms, both published by Cambridge University Press in 2014 and 2020, respectively. His research focuses on scalability and efficiency of large scale parallel and distributed systems, from massively parallel to Internet-based platforms, and on data mining algorithms, their parallelization, and application to areas such as data science, information retrieval, cybersecurity, and e-governance.