I applied online and was then scheduled for a recruiter call. 5 minutes into the interview without anyone there, I emailed the recruiter if the time was still good. He then showed up, and it was clear from the questions he asked, the lack of any follow-up questions, the disinterested demeanor, and the fact I wasn't given a chance to ask any questions myself (e.g. "Do you have any questions for me?") that he already decided he wasn't going to submit me over to the hiring manager. I never received a response even after following up. I think this was a clear case of ageism, so I recommend don't apply to any engineering positions at this company unless you are young.