Have 2 years of experience of php. I have build a custom form-builder that is used by admin to create any type of form and that form is filled by front end user, for this form-builder i have used jquery to create the form-builder, mySql for save the form and php to render that form. I have also worked on SSO(Single Sign On) that is used to login with another site like we see most of the sites provide login with facebook, twitter etc.