Braze Software Developer interview questions

They cancelled a phone call 30 minutes before it was schedule to take place. I don't mind companies cancelling interviews, since if there's no mutual interest, an interview is a waste of time. However, it is extremely unprofessional to do it at the last minute, since people might have actually had adjust their plans to work the call in (i.e. work from home, take 1/2 day off, etc).

They sent me a 1:30 HackerRank challenge (one month after I applied) which consisted of one easy and one medium difficulty problem from a no-reply email address. I completed the challenge and solved the first one and passed half of the test cases for the second one. The test environment was absolutely stupid in my opinion which made it impossible for me to debug. A few days later I got a generic rejection message from another no-reply email.