OTTO Engineering Senior Embedded Software Engineer interview questions

Scheduled an interview for this position through a recruiter. 20 minutes past the scheduled interview time I had not received the call so I emailed the recruiter to see what was going on. 10 more minutes later, I was told that no one was responding to messages at the company and the recruiter didn't know why they hadn't called. I ended up cancelling my interview for other reasons, but them never calling without explanation left a bad taste in my mouth.