Sérgio Barbosa is a PhD candidate in the program "Democracy in the Twenty-First Century" linked to the Centre for Social Studies (CES) at the University of Coimbra. From August 2020, he was awarded with a FCT (Science and Technology Foundation) Research Fellowship, grant reference: SFRH/BD/143495/2019. Prior to joining FCT cohort of fellows, Sérgio was a SYLFF (Ryoichi Sasakawa Young Leaders Fellowship Fund) fellow sponsored by Tokyo Foundation for Policy Research. Currently, Mr. Barbosa is a visiting researcher at Utrecht University (2021) and previously at University of Amsterdam (2019-2020). He is a member of the Technopolitics - a "Latin" research network connecting Brazil and Ecuador with Spain, Portugal and Italy. He is also a member of the COST Action CA17135 'Constitution-Making and Deliberative Democracy'. His research interests include the emerging forms of political participation vis-à-vis the possibilities afforded by chat apps, with emphasis on WhatsApp for digital activism and social interaction, focusing on WhatsAppers, Digital Sociology, Digital Activism, and Data Ethics. His research has been published in peer-reviewed journals such as the Political Studies Review, Westminster Papers in Communication and Culture, and First Monday, among others.