After having a call with the recruiter and a manager I received a very extensive take-home assignment, which was not very clearly defined and a lot of work. I spent 4 hours to get a reasonable solution (more than that is not worth it for me for a job) and they didn't like my solution so I didn't get another interview. I would have liked to at least get a follow-up interview to explain my choices and discuss them, since there was quite some ambiguity in the assignment, and it seemed fair after putting in so much effort.