She was a member of The Greens and of Young Socialists.[1] She ran in the 2014 European Parliament election on the Greens' list and was the chief of staff of Joanna Erbel, the Green candidate for mayor of Warsaw in the local government election. In 2015 she left the Greens and became one of the founding members of the new political party Partia Razem. Since the party's foundation in May 2015 she has been a member of the National Board of Razem.[1][2]
In the 2015 parliamentary election, she ran as the first candidate on Razem's list in the Katowice electoral district. She received 8316 votes, but her party won only 3.62 percent of votes, so did not gain any seats in the Sejm.[4]
In January 2018, Forbes magazine included Zawisza on its annual EuropeanForbes 30 Under 30 list in the "Law & Policy" category for her role as a co-founder of Razem, which organized the "black protest" against a total ban on abortion in Poland.[3]
Zawisza was elected to the Sejm on 13 October 2019, receiving 19,206 votes in the Opole district, campaigning from The Left list.[5]