Wix Backend Integration Specialist Needed

I need a skilled developer to enhance my existing Wix website by integrating backend functionalities. This includes user authentication, form submissions, and document management.

Key Requirements:
- Employee authentication with restricted access for partners
- Integration of several forms (Legal, Passport, NDA, Teaming Agreement, Proposals, and more)
- Document management for easy handling of submitted forms and agreements

Ideal Skills:
- Experience with Wix and its backend systems
- Strong knowledge of user authentication and form handling
- Proficiency in document management systems
- Ability to create a seamless user experience on the platform

Please provide examples of similar work done. Looking forward to your bids!