Ongoing Magento Work

We operate a number of online stores based on Magento. We are looking for an all round Magento expert to work ongoing as needed doing anything form new themes to custom modules. You need to be able to: - Create new themes (PSD will be supplied) - Populating the Store (products and content) - Setup of Multiple Store Fronts - Importing products from Oscommerce (on stores we are rebuilding) - Setup of custom shipping and postage - Creation of custom modules - General front end design tasks Please bid on an hourly rate as the tasks required will be varied and ongoing.