Mobile applications should have the ability to adapt their behaviour according to changes in their context. Specific or spontaneous user requests, variations in the availability of system resources, like energy or wireless connectivity, or changes of the user’s location are possible reasons for such adaptations, that usually aim to adjust the application’s operation to the new context, optimize its performance or personalize its user interface. Aiming to offer greater facility for implementing dynamically adaptive mobile applications, the Kaluana middleware defines a service-oriented component based model. This model supports dynamic component composition, reconfiguration and deployment. Applications executed on the middleware can compose Kaluana components at execution time. Therefore, these applications are dynamically adaptive, taking advantage of the model features. The components development is faster due to usage of computational reflection tools and service orientation concepts that provide adequate abstractions to the developer. This way, dynamic adaptable applications built upon Kaluana consist on compositions of these software components. Kaluana was implemented on the top of Android platform and was tested for the development of map based location-aware mobile applications.