Back-end app developer

We are looking to develop an app like similar to "Xubba - A talent live streaming platform." We need a Back-End App Developer responsible for managing the interchange of data between the server and the users. The primary focus will be to develop all server-side logic, definition and maintenance of the central database, ensuring high performance security and data protection.
Kindly download and let us know cost and time required to develop it. Send us a message or email us.