I have extensive experience in scalable platforms, and work in backend with API Restful with easy code maintenance and reuse. We can develop in SQL or Non-SQL database. I will provide the backend API and the json documentation for use in Insomnia or Postman.
I calculated the price per week, based on your offert.
To recalculate the total price, I will need details about the features that will be developed, to estimate value.