Make changes in an existing Plugin - Expert Level

Hello, I am looking for a wordpress expert to make changes in an existing DHVC/Visual composer plugin. At the moment, whenever user submits a form, there is no front end validation of the form. We want you to do the front end validation for the forms that are created using DHVC/Visual composer. For example: 1. Show that all fields are required after user submits an incomplete form while highlighting blank fields in the form. 2. Show 'This field is required' when user skips to a different form field while filling the form. I would love it if you are able to start right away. Thank You.