She ran for member of parliament in the 2021 general election as the VVD's thirteenth candidate and was elected with 3,246 preference votes. She was installed as House member on 31 March and became the first person on that body of Polish descent. Rajkowski had already left Utrecht's municipal council in February, and she also left Valtech. In the House, she is the VVD's spokesperson for digitization, government IT, telecommunications, the General Intelligence and Security Service, and cybersecurity. Rajkowski is on the Committees for Digital Affairs, for Economic Affairs and Climate Policy, for the Interior, and for Justice and Security. She called for Russian hackers to be put on the European sanction list during the 2022 Russian invasion of Ukraine. Rajkowski also proposed a ban on deepfake technology out of concern for its usage for revenge porn and political hoaxes. She raised the possibility of an exception for businesses using the technology for legitimate usages. A motion by Rajkowski requesting the cabinet to draft such a bill passed the House of Representatives in November 2022.
