HexagonFab interview questions

Screening interview (30 mins) followed by technical interview (1 h). Screening interview was standard, relaxed and casual. Technical interview felt more like an interrogation, the founder was like a dog with a bone with each question. I think the problem here was the difference in academic backgrounds. As my work requires a lot of different techniques, I'm not an expert on the in depth theory of how each bit of equipment works (who is?!) and I think this is what the founder was looking for. Personally, I did not enjoy my experience of the interview process and had already decided I didn't want to work there based on the atmosphere of the technical interview. I did, of course, still want feedback so that I could use it with future interviews. However, even after two follow up emails, there has been radio silence from them.