I went through a recruiting agency to set up an interview with them. I went through a phone interview and a written test. I was told that I would hear back by the end of next week. Not only did they never give me a response, but they ghosted me and the recruiter. It was an extremely unprofessional way to handle that, and I was told they do this to other recruiters too and they are some of the only ones.

Ghosting applicants, especially ones invited in for any sort of interview, is terrible enough. However, ghosting the recruiters too is just despicable.

Phone interview was very generic and asked for general experience and preferences, nothing too specific. Only enough to get me interested.

Written test included advanced SQL, Java, with multiple optional tests in Perl, advanced Python (specific libraries), finances.