As the Internet of Things (IoT) increasingly incorporates mobile devices and objects, this also calls for scalable services capable of handling a growing number of concurrently connected mobile devices. Consequently, the ability to provide reliable services that are adaptable to different scenarios, efficient, and high-performing in a highly mobile environment is crucial to meet user expectations and drive widespread adoption of IoT mobile applications (IoMT). In this work, we design and implement a self-scalable and configurable architecture, allowing application administrators to configure scalability parameters according to their needs, using Kubernetes in ContextNet, a distributed IoMT middleware, and evaluate the performance of our implementation in different scalability and mobility scenarios.