They didn't understand why anyone would design a system like that and asked if I had the choice again, would I build it the same way. Their correct answer was micro-services up the wazoo.
I tried to explain that startups don't have budget or desire for massive infrastructure or are generally only interested in building a prototype to validate product market fit. Wasting money on ivory tower systems was a waste.
At no time did they ask if the system supported the workload or even how many users we had. Nope straight to build massively complex infra.
I've forgotten that a lot of s/w engineers who work in the real world/large companies, don't have any idea some of the pg mantras we all chant.
Major red flag. Pass. :/