Introduction When designing complex trading operational systems composed of multiple specialised processes, ensuring reliable, effective communication among them can be a significant challenge. Traditional approaches, such as remote procedure calls or direct binary protocols, can introduce tight coupling and inefficiencies in certain scenarios. For very high performance, low latency links, that may be acceptable and sometimes necessary, but what about the many other pathways within systems that are less time-sensitive? Interprocess communication techniques To start with, it’s worth reminding ourselves of the wide range of approaches to managing communication between separate processes. Focusing on the .NET ecosystem, we can think