Ok so we need a guy who is sound with wordpress plugin customization + jquery development.
Currently we're having a plugin, which enables user to create multi step form, so when visitor fill it, user can receive it all in his email.
We want to replace the drag & drop form builder (using which user create the frontend form) with something modern says kind of gravity form drag & drop builder with several field option.
So we want you to create a similar drag & drop builder and replace with current one and should be work perfect with plugin other features. If you've read all details of this project, then write 'got it' as first line of your proposal writing.
Review plugin at : http://dev.witoni.com/proforms/wp-admin/
Gravity Form Demo Link:
Demo URL: http://sympathetic-goldfinch.w5.gravitydemo.com
Admin URL: http://sympathetic-goldfinch.w5.gravitydemo.com/wp-admin
Bid only if you're capable to build something with 100% accuracy.