Nobody can judge their own interview performance - engineer or not. The hard part is that you as an interviewee don&#x27;t really know what the interviewer is looking for. You may have nailed the back half of the interview, but you don&#x27;t have the one skill they&#x27;re looking for. Or sometimes you don&#x27;t blow it at all and they love you, but there&#x27;s one other person they interviewed for the position that blew them away.<p>Trying to guess how well you did in an interview is folly. Hell, one interview tactic I use with people is to push them until they break: I keep asking technical questions until I reach a point where you say &quot;I don&#x27;t know&quot;. This sometimes makes people think they &quot;failed&quot; the interview, when all I&#x27;m really trying to do is see how much you know while also seeing how much you&#x27;ll bullshit me on topics you don&#x27;t know as well. Nobody can be an expert on everything, and interviews are as much about behavioral profiling as they are subject matter expertise.