changes to an existing webapp

I already have a web application built and hosted in react+firebase. I would now want to add more features such as (a) having a new user role (staff), (b) a new record creation page where staff can create new records (which also include article length long, formattable text content), (c) a new dashboard display for showing these records in ‘tiles’ format; (d) and implementing the search for the web app using Algolia or any other third party api. The broad purpose of this assignment is also to make the website fast and user-friendly. So the developer should also be willing to fix some of the identified bugs and also suggest design changes. If interested, please reach out and I will share the document with detailed description