I think it is more interesting for companies if you contribute in open source projects relevant for your future jobs rather to single-person side projects. It m

I think it is more interesting for companies if you contribute in open source projects relevant for your future jobs rather to single-person side projects. It means several things: you can join a team working in a project, you know how tools like git work and how make a pull request, you have experience with something you might use in your future job and you can collaborate with others. If it has to be a single-person project, then it only has some value if you released it and people is using it.