[iLoch]

This is why SV needs to stop abusing the term "engineer" - because this is indeed work that can be done on the front end, but under no circumstances should you expect front end developers to know how to do this. If you have a specific need, or you're building something very complex, then you probably want an engineer -- most companies (including any of the big ones) typically only need developers. It's good to have engineers tinkering with stuff though, that's how you wind up with things like React.

[qaq]

Right or you could have a "developer" tinker with stuff and that's how wind up with things like redux

[iLoch]

Oh yeah absolutely - not trying to take anything away from developers particularly. Different skill sets, but practically the same outcome most of the time. That's a great example of why knowing how to create a BST from scratch isn't the only knowledge needed to build great software.