Type "design" before you start your proposal.
You have to show your live work on bootstrap and angular js.
I have implemented API at server side. I will provide you skeleton of pages in raw html and you have to create the template/theme on those pages.
I am experienced in angular.js 1.4 and i am sure i can do what you are asking for. consuming WEB API endpoints using angular services is quite familiar to me.
Size of the project is not clear in terms of Number of Screens to be developed, type of API, Validation and workflow expected in each screen etc.
Please provide more information to assess the size of project