AJAX Form: add reCAPTCHA - wordpress / php / JQuery.Form

I need an experienced coder to add reCAPTCHA to an ajax contact form. The two main tasks: 1. add reCAPTCHA into the ajax form; 2. ensure reCAPTCHA is validated before allowing the form to be submitted. I do not wish to use any Wordpress plugin to achieve this. This should be straightforward and lightweight. The form uses two main JQuery plugins: Validate and Form (see [login to view URL]). I prefer someone with experience of both, or at the least, the Form plugin. Please PM me your url or if you want to know any further details. Thanks.