As part of CloudUT, a cloud infrastructure and platform for research, we introduce the IoT service with the objective of creating a support infrastructure for research projects that involve sensor-based monitoring and data analysis tasks. This service aims to reduce the costs of acquiring data storage and processing resources and to reduce the development time and cost of custom software components. In this paper we present the functionalities provided through this service. Moreover, we describe the IoT service architecture, its components, as well as the challenge of re-designing and extending existing tools to obtain a cloud-native solution that can be scaled to accommodate multiple users and to reduce the execution time of the analysis procedures.