During the late 1980s, Tarasiewicz was an activist with the Freedom and Peace Movement (pl), and worked as a labour activist.[1] She pursued university studies in Gdańsk, graduating in 1987 with a degree in political science and English.[1] From 1989 to 1991, she was the president of the women's section of the Polish trade union Solidarity.[1][2] From 1991 to 1995, she was coordinator of the Polish branch of Amnesty International.[1] She then became the head of the Network of East-West Women (pl), an organization which seeks to foster coordination on feminist issues between the post-Soviet countries of Eastern and Central Europe and activists in Western Europe and the United States.[1] From 1997 to 1999, she was involved in efforts by Amnesty International to help establish the International Criminal Court.[1] From 2003 to 2005, Tarasiewicz was a member of the national council of the Polish Green Party.[1]
In the local government elections in 2014, Tarasiewicz was an independent candidate to be the mayor of Sopot, placing 4th.[3] In the 2018 elections, she ran again with the Free and Solidary party, again placing 4th.[4]
Tarasiewicz was featured in the 2011 play Sprawa operacyjnego rozpoznania.[5] In 2013, she was awarded the Cross of Freedom and Solidarity.[6] In 2020, she received the Commander's Cross of the Order of Polonia Restituta.[7]