I can design and develop backend API services and Android applications in 6 months

I can build various kinds of Android applications starting from health domain to e-commerce based applications using Java or Kotlin. If required I can also develop the backend API services using Java Spring Boot and Hibernate.
Following are the requirements from the client side -
1. A server where I will be uploading the backend API services so that it is publicly available for mobile app development.
2. The screen designs for the app