I was contacted by one of Alarm.com's talent recruiter's who had seen my profile on Handshake and invited to apply to the position. I then talked with him on the phone for an initial overview. After that I was sent a HackerRank coding test in C code, following submitting that I had another phone screen with a member of the Boston Team. I then was later invited to an onsite interview with multiple team members. A week or so after this I was sent an offer, which I accepted.

Typical phone screen first for 30 mins. Then required to do a 4 question HackerRank in 60 minutes. Questions were at least medium level and languages locked to C and C++. 2 of the questions involved sorting/algorithms. Had another interview with a senior engineer which went well, talking more about embedded software. Notified that we would not be proceeding with more interviews. I asked for some feedback but was sent essentially the same denial email again. Practicing lots of medium level HackerRank/leetcode seems to be a prerequisite.