First I was contacted by the recruiter, who I found extremely kind and genuine. We corresponded over email to set up a technical interview. When I picked up my phone for the interview, the other side was very noisy, and the engineer on the phone didn't bother to greet or acknowledge who I am, and immediately started spelling out the problem to me. He had a heavy accent, which was difficult to understand on top of the distracting background noises. The problem he gave was also a complicated one, with conditions he did not describe very clearly even as I kept asking for clarifications. All in all, the interview itself did not go so well, but I took it as a learning experience.