What problem is this solving?
That said I guess it depends a lot on the kind of keyboard/editor you have. On my Finnish layout I can press '<' without the need for shift, and the closing symbol will almost certainly be auto-entered by my editor.
Why is < given so much importance in your layout? What do Finnish people typically use that symbol for? And what happens to the key it normally shifts (the comma, I think, in en-US)?
As for the layout, I have no idea sadly. The keyboard looks like this though - you'll see an extra key next to the left-shift with those symbols on it:
https://en.m.wikipedia.org/wiki/File:KB_Finnish_Multilingual...