need a developer for opencart -- 5

We need someone to do the following : 1- the COD extension in opencart need be changed to be for selected products only , then send data to shipping company " code for API already made " 2- reduce the number of DOM in the website 3- minify the JS , CSS , HTML 4- fix the homepage layout to be as perfect as possible 5- enhance google record 6- fix all website issues max payment : 50$ best offer will be hired we use opencart , journal 3 theme deadline is 7 days