[SolubleSnake]

I also don't know how this should work and some people's comments on this thread seem really weird to me because it seems really unlikely that someone who was eg a 'senior software developer' somewhere could be so bad that they couldn't write basic code but maybe?

In regards your comment about the Canadian idea of 'Professional Engineers' we have the same thing in the UK but it's called 'chartered engineers' and there are (more in theory than in practice) requirements around ethical and legal issues. This isn't really used in the same way I think it's used in Canada. I have worked with CEng people and I was going to go through the process (you need two sponsors you work with and you need a STEM degree that is recognised and you need 6 years of relevant experience). It's not an easy thing to get but it's not a guarantee someone is a genius or totally reliable but I haven't really seen anyone with that behaving in a way that is completely unreliable.

I wonder if it might be something to do with 'start up culture' where you've got very small teams and they're often young. You can't really tell kids to 'do a degree, get 6 years experience, qualify...then make your 'uber for milkshakes'' (or whatever they are planning to do). If you've got really young applicants you can't really expect that.

to be clear, CEng doesn't even require an exam, although everyone who would be in a position to become CEng has already done a lot of exams.

Perhaps the Leetcode thing must exist if people just refuse to qualify and want to get busy quickly. I think that is totally fine if you're making 'Uber for milkshakes' or similar but if someone is doing something that requires some responsibility then probably better to have people be vetted by accepted peers.