Website API Integration

I have a hosted WordPress site that needs to interact with our corporate API. Our API will receive a REST POST/PUT call from the website and return a response. What we need is someone to help us integrate these calls & responses on the website. The pages and forms are already built. But we need someone with strong PHP and WordPress so the results can be handled. * We will provide a REST map, the calls and API Keys. * You will integrate the REST calls and responses on the appropriate page or form. There will be a couple of forms and responses. * There is a new account (POST) creation call - redirect to success page or show returned error. * There is login request (POST) that will result in a one-time token link for them to use and reconnect to the website where they can then login (POST with token in the url and some minor payload). The login will return a payload to populate a form. * There is an update (PUT) call with a redirect to success page or show returned error. In some cases, in case of error that message will be displayed upon the form. In other cases, a redirect to another form will occur. I have this all mapped out via diagram