Szostak is a journalist and researcher, with a strong focus on local industry and entertainment content. Works as an assistant professor in the department of cultural and media studies at the SWPS University in Warsaw. She completed her PhD at the University of Nottingham and later worked on the Screening Socialism project at the University of Loughborough, which investigated the role of television in everyday life under socialism. Her work has been published in The European Journal of Cultural Studies, The Journal of Popular Television, and Critical Studies in Television. Worked in the industry for TVN Warner Bros. Discovery.