Kim studied Political Science and Urban Environmental Management and during her studies was active as a co-chair at DWARS Amsterdam. With the Young European Greens (FYEG), Kim was a member of the climate and energy working group. Later on, she started working as mobility communication officer at Milieudefensie and was elected as co-president of FYEG. Here she represented more than 10,000 European young people in their fight against climate change. In 2019 Kim was elected MEP for GroenLinks.