[bamazizi]

I highly recommend you look into gRPC.

Building apps using event sourcing, CQRS and microservices can easily become hell if the data models are not thought through.

[_pmf_]

I thought RPC and CQRS are diametrically opposite patterns. (Although you can use RPC in a CQRS context, but only as a transport/encapsulation layer (so the response says "request queued" or "error", but does not divulge domain specific information ("item created", "item not created")).