Improve UI for our general online data analysis and visualization tools (R)

We are the developers of a simple online user interface for complex data analysis and visualization. All the users need to do is just to upload their data from their hard disk, then everything else is only a few mouse clicks. They can draw histograms, line charts, point charts, density charts, boxplots, google motion charts, etc in a couple of seconds; they can also perform complex analysis such as clustering, heatmap, Generalized Linear Models, Survival analysis, Cox Proportional Hazards Models by mouse clicking. Here is the link for the tools: [login to view URL] The UI is still at the testing phase, not 100% in shape but in working condition. Now we need someone to help us to improve the UI of these applications, in both appearance and functionality. For example, improving the layout, fonts, color, adding frames, icons and images, and adding functionality such as checkboxes, scrollbars, etc. The applications are written in shiny, javascript and html languages. We welcome you to contact us with your ideas of design and improvement, your rough estimates of time needed and the range of the compensation you expect. Look forward to hearing from you! Regards, CDA developers