She is a professor at the University of Warsaw, and her research focuses on penal systems, criminal and civil law, gender studies, and feminist jurisprudence.

[4] In 1992 she completed a doctorate with the thesis Przyczyny niepowodzenia okresu próby przy warunkowym przedterminowym zwolnieniu (Reasons for the failure of the probationary period under conditional early release).

In 2008 she completed a habilitation in law for the work Systemy penitencjarne państw skandynawskich na tle polityki kryminalnej, karnej i penitencjarnej (Penitentiary systems of the Scandinavian countries against the background of criminal, penal and penitentiary policy)[5] at the University of Warsaw.

[7] She has also served as head of the criminology department, and deputy director of the Institute of Criminal Law at the University of Warsaw.

[11] In 2015, Płatek ran for the Senate of Poland on behalf of the United Left coalition, receiving 13% of the vote.