Biomedical time-series analysis is a diverse field that includes biomedical engineering, computer science, and medical achievements, with the goal to save human lives and improve the quality of healthcare. In this paper, we present a preliminary report on construction of an innovative web platform for heterogeneous multivariate biomedical time-series analysis. The platform will feature data upload, preprocessing, feature extraction, model construction, visualization of signals and disorders, and reporting. Several scenarios of use will be prepared for a user, depending on his research or practice goals. An expert system for feature recommendation, specifically designed to support clinical decisions, will be implemented in the platform. In the current phase of research on our project, we describe the features of the platform, including some of its technological details, and the way in which we designed scenarios of use. Future papers will focus on specific aspects of the platform.