Build a Ruby on Rails App

Hello! I am looking for a custom Ruby on Rails app just like SuperPortal - [login to view URL] - this site allows Stripe customers to connect their accounts to enable them to basically allow their customers to access the Stripe Customer Portal to update their information, add a payment method and more ([login to view URL]). We are wanting this to be a SaaS application with a monthly fee of our choosing. We would like to keep the database simple and as little sensitive data as possible. No login page either, users would get and email with a link to directly "login" Thanks!