Applied with referral and got a coding challenge about 2 weeks after. Completed the coding challenge and about a month later, I got called by a recruiter without any prior scheduling on the weekend at almost sunset, to schedule a phone interview later the week. There weren't any confirmations through email or anything so I was sketched out. The phone interview did take place and they asked for my availability for the next 2 weeks soon after, which I filled out ASAP. I never heard back about a interview confirmation.