Client-server product. What to write on?

Question

Java

Good afternoon.
I set myself the task of developing a mobile application for a grocery store (as an example), with the possibility of developing a mobile application. The general architecture will look like a client-server variation: first I write the server part, with the ability to edit, add, etc. That is, all logic will be performed on the server. The mobile application will hook on the API and simply download the necessary data. Everything is clear with mobile development. But there are some issues with the server side. Which development tool to choose? I know a little and in the process of learning Java. Is it possible to fully develop the server side in Java and will there be any problems with the speed of work? If so, what would you recommend instead of Java?

Answer 1

RESTful API on JAX-RS (Jersey)
And here's a link to a great course on the topic: restful-services-java-using-jersey
Oh yes, the course is paid, but I can drop the presentations and code for you if you want.
Good luck!

Answer 2

C# + Xamarin = web api + apps for 3 platforms