Build a Website

I am looking for someone to design a website for my company, [login to view URL] that would include current features (company information, family application and sitter application) along with ability for clients to log in to their personal account, request sitters based on their personal profile, view calendar of their requests, view confirmed appointments and complete billing tasks. I currently use a site called [login to view URL] to manage my sitters, but would like someone who could modify the API to customize it more to our needs. On the sitter side, I'd like for sitters to be able to log in and update their profiles, and have certain details of that profile made public to our registered clients. Wordpress platform would be ideal because I could easily make updates as needed.