Need Wordpress expert, coupon website customizations

**We are looking for someone with several year's experience in using Wordpress.** Our website is powered by WP and lists many coupons sorted by store, we are looking for someone to make various changes to the underlying code and to also build an import tool for datafeeds - y**ou will need to have experience with XML feeds also**. Please note this is an ongoing position and I would like to work with you in the long-term so if you are only available for a few days please do not bid. We will list all changes needed in our Trac system. Some examples of changes that are required : to install a different captcha system into Wordpress, change the thumbnail generator, modify the QuickEdit function , change slug URL system, etc. An immediate start is required, thanks.