Powerapps and SharePoint website

I am looking for a freelancer who is experienced in Powerapps and SharePoint to develop a private website with the following requirements:

Functionality:
- Workflow automation: The website should automate various workflows within our organization.

Website Privacy:
- The website should be private, accessible only to authorized users.

SharePoint Business Logic:
- Custom SharePoint business logic is required to meet our specific needs.

Ideal Skills and Experience:
- Proficiency in Powerapps and SharePoint development.
- Strong understanding of workflow automation and document management.
- Experience in implementing custom SharePoint business logic.

If you have the necessary skills and experience, please submit your proposal.