Customization of Ext Scheduler

Need a developer who is familiar with the "Ext Scheduler" ([login to view URL]) - with at least one completed project for a satisfied client. The "Ext Scheduler" will be the main user interface for this intranet application - but it needs to be heavily customized and extended with custom forms for adding and editiing data for the scheduler. Scope for first phase will be a working prototype which should be implemented correctly but using 'dummy'-data. In the second phase the user interface should be coupled to the .net project which will handle the communication between the uder interface and the Oracle procedures provided by the projects Oracle guy. First phase contain use of the component and the ability to demonstrate full control over the components possibilities (using data filters, customize a number of component options etc.) in order to secure that there's the required skills before implementing the next 6 phases (including .net project for handling business rules, validation etc.). First phase will be a timebox of a number of hours where requirement list should be implemented as far as possible - and next phase will depend on the result.