Clients and server communicate with each other using XML-RPC, a remote procedure invocation protocol transported over HTTP and encoded using XML.

The use of the functional language Erlang was a key factor in the development of the application business logic. It contributed to shorten the development cycle, to make the deployment in a low-cost cluster, to make the system scalable. It also contributed to configure the system in a supervision tree, which combined with the storage of the internal system state in a distributed database, resulted in a system with the desired high disponibility and fault tolerance features.