Had an initial phone call with a recruiter to go over general background and set up an onsite interview. The interview was pretty typical. First part was fairly informal with two of the managers of the team that was hiring. Second part was a fairly standard hakerrank challenge. They were very adamant about telling me I would hear back very soon, as in either the same day or early the following week. Well, the following week rolled around, so I reached out to the recruiter and was told I'd hear back by the end of that week. End of the week came and went, so I reached out again. Same thing; I'd hear back by the end of the week. This went on for nearly a month with several of my inquiries going entirely ignored. Incredibly unprofessional and just flat out rude. You're hiring people; treat them as such.