How to organize work with common entities for a client-server application?

Question

Java

The client is written in C# and the server in Java. Both have different repositories. Question: how to organize the exchange of common entities between different repositories? Now the java code is converted by an ordinary C# converter. The result needs to be put somewhere so that the client can use it as well as the server. Many people will probably advise using protobuf, but this does not negate the fact that proto files will have to be stored somewhere. Tell me, who is dealing with this problem?

Answer 1

Upload to redis for example.