They said i aced the coding test . The hiring manager said at the end of my system design interview that my systeam is good the only thing he'd add is kafka on top of rabbitmq.(OK) 24h after they came back to me with they're looking for stronger skills around scaling and limitations.  Really disappointed about their response. During the system design interview the manager interrupt me several times while i was giving my solution i think he just wanted me to give the solution that he was looking for. But there can be several solutions that address the same problem . Looks like he was not enough smart to understanding that.