Php custom coding in existing project

General information for the website: ecommerce stores for customers Kind of development: Customization of existing website Num. of web pages/modules: 8 Description of every page/module: we have a project currently live and up at the moment, we'd like to hire a professional to perform the following tasks. Description of requirements/features: TASKS: 1- removing license verification 2- automated email confirmation - On Sales (3 emails)vendor, admin, customer 3- SMS confirmation, - Sign up vendor / customer (text confirmation) - Sales Alert to vendor and customer 4- Integration of API (payment API bank and one other) 5- Discount coupon should only work for that particular vendor. 6- Dispute section like PayPal. 7- Payment module for vendor, cash and cc dc but no option in vendors account area. 8- Currency change automatically from IP and google currency rates. Extra notes: