The document summarizes a co-design process for a social media service to promote civic participation among immigrants in Finland. A team of immigrants, researchers, and community organizations worked together over 18 months to design the Monimos service. Key challenges identified included defining clear goals and visions, ensuring inclusion of all participants, facilitating interaction through appropriate working methods, and establishing decision-making processes. Through an open and participatory design approach, the project provides lessons for how to develop social media and digital services through community-driven codesign.