It felt like I was back in college dealing with pretentious professors because they spent 20 years on one subject but I bet you 5$ they could not apply their knowledge in the real world. They have the nerve to want an experienced unicorn for this position. It is a start-up they need to humble themselves. You will not get everything from one candidate especially when you are throwing together two to three jobs into one position. They said they want "smart people" meaning they want a person to nerd out and overwork themselves on projects without knowing they are getting talked advantage of. if you are an expert at programming( any language), and you build and design any type of circuit inside and out, and can do mechanical design work and testing too. Why would that person want to work at a start-up that is not their own?