Need PHP programmer who knows shop-script 6

Need PHP programmer who knows shop-script 6 for the following tasks:
1. It is necessary to do goods accounting in Google Analytics in an advanced module of electronic trading orders generated via ajax (order in 1 click)
2. To deal with multidomainhost that on another site goods different prices from the main site
3. How to fix hang up issue fast browsing in slow Internet connection
4. Easy to implement AJAX filter
deadline to 20.12.15