Basecamp API Project

Hi All, We need someone who is familiar with the Basecamp API to help us develop an Add-on for it. Here are a few of the primary uses of this that we'll need incorporated: - Singular module for assigning users to campaigns across multiple companies * Currently you can only do this at the parent company, but we'd like it so that users can unknowingly login under the main admin, and adjust user access to campaigns (based on current users and current campaigns). - Allow for exporting of data to Excel in an easier fashion We want someone who has experience with the Basecamp API and can show examples of work. The first check box is the most important, but we would likely add on additional features if we find the right fit, and build out a better dashboard for our large account. Feel free to ping me for more questions on this project, as I know this is a fairly vague request. Thanks! Jeff