Ubuntu :: Press Backspace To Delete An Entire Tab Instead Of Individual Spaces?

I write sources in VIM and i use the following settings:

set tabstop=4
set expandtab
set autoindent

And I have got some questions. 1:Is there any way I could do, so when I press backspace to delete an entire tab instead of individual spaces ? 2:Is there anything to do to delete a tab if I insert a closed curly bracket.

Code:
int main (void) {
} // <- and this one gets perfectly aligned