GIS Interface for Web Application Programmer

I am looking for highly skilled program who can start immediately to create an GIS interface for my web application. The scope of work will include - creating a transactional web feature layer that allows user to create/edit/delete points/lines/polygons on a selection of basemaps - allowing user to save attributes and upload files to each of the feature drawn - performing geometry functions such as calculating lines distance and polygon area. - filtering feature layers so users can choose to display certain groups of features - creating a per-user based profile for editing feature layer and storing of data - controlling permission so that only the users with proper permission can read or write to specific profile You will need to be highly skillful at the following toolsets and technology: - Silverlight, PHP, ExtJS - Geoserver - ESRI ArcGIS - PostGIS, MySQL - WFS-T, WMS - Openlayer - Google Map You will receive the following: - Detailed requirements - Fast response to clarification questions - Screen mock-up As an interview process I will only consider people who can provide portfolio or code snippet of similar scope.