Joomla Custom module needed web service

I would like someone to design for me a custom module for Joomla that would work on 2.5 – 3.0. The custom module would have to create a number of structured tables to store data in relation to the joomla users table. The module will have to be exposed to allow mobile devices to access this data via requests and responses in XML or JSON preferably JSON. The mobile devices should be able to post data on these tables, which will need to be moderated by some simple server side business logic. Send me an email if you are interested, with a ball park figure that we can further discuss when I give you more detailed requirements. Module should: > Have 4 -5 tables that can store relational data. > The data can be accessed by remote devices via wed service using json as a MIME. > The table data can be moderated in a web view in the joomla backend. > The data can be displayed to unauthenticated users in the font end.