I will give preferences one that is most relevant to my skills and proposes a professional working environment
Since 2010. I have been working on the Norwegian project. Now they are bringing out the 3rd version. The project is tailored for Norwegian schools. I've wrote the main and accompanying projects from 0 in Python. There were 2-3 people in the team. Developed everything from 0 myself: Online payment / acquiring, SMS services, e-mail, performed part of DevOps.