A method is disclosed for producing a software application with at least two layers, including a processing layer and a process layer, wherein each layer is encapsulated and hence platform-independent in its execution, the encapsulated layers communicating via an application programming interface. A system is also disclosed for producing an application including a flexible interconnection interface between encapsulated layers. By virtue of the implementation of an additional configurable interconnection interface in the application programming interface between two encapsulated application layers, the architecture layering can be retained regardless of the respective deployment, and only the communication profiles of the interconnection interfaces need be adapted to the deployment. This has the advantage, in at least one embodiment, that it is not necessary to produce and update different source code masters for the different deployments, and instead only one single architecture layering of the application need be created and maintained.