Build intro UI and application functionality

The application idea I have in mind is essentially an online costco. One must be a member of our platform in order to purchase products at a competitive price. I am an experienced developer in swift, but my UI architecture is very bad. I'm offering a fixed price for someone that can develop the following views/functionality: First time user- -App starts, prompts user to sign in or sign up. -User will then sign up and provide basic information and tax ID for resale purposes -I will then receive that information via email or through a DB and will authenticate the acceptance of that user -If user is approved, notification to phone and email should be sent and they should be able to see product pricing. If these tasks are completed well, we can negotiate full time employment.