Interoperability and conformance testing are needed to ensure that systems behave as specified by the standards they implement. Today, interoperability testing is done through face-to-face "interop events". Requiring physical presence of all parties impacts the scalbility of the testing, and slows down the development of standards-based products. F-Interop is a platform which enables remote interoperability and conformance testing of networking standards. This paper gives a technical overview of the project and its software architecture. The architecture follows the event bus design pattern: generic messages are routed between the different software components, some of these running at different locations.