When every hire can make or break your company, then you are looking at this from a very wrong perspective. In that case you should be hiring in network, candidates you know, or are vetted by people you trust. Or hire people on contract and convert them to full time. Or work with trusted vendors in the field who can source great candidates.

Not every SWE can work at every company, that is pretty much true. But creating arbitrary “signals” to figure out who will be a great fit will doom your company with a very specific type of people, which is not what you want when every candidate can make or break your company.