Have you had experience using gRPC in your projects?

Yes, I have used gRPC in several projects to facilitate high-performance communication between microservices.

gRPC allows defining services and methods via protobuf, which provides a strictly typed contract and efficient serialization.

Example of using gRPC in Go:

// Service definition in protobuf
service Greeter {
  rpc SayHello (HelloRequest) returns (HelloReply) {}
}

// Server implementation
func (s *server) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
  return &pb.HelloReply{Message: "Hello " + in.Name}, nil
}

I used gRPC for data exchange with low latency and streaming support, which improved the scalability and reliability of the system.