Greetings !!
What I understood is, You are looking to update in an existing application and create a new module in the application.
Would be great, if you provide detailed specs so I can make best possible suggestions to you.
"I have passed PHP5 test with 100% on Freelancer."
I am Mustafa, a Solution architect working for Canopus Infosystems located in India. We are team of 40+ experienced designers, developers and testers.
We have extensive development skills of Ecommerce Shopping Carts,Web APIs using PHP, MySQL, Zend Framework, html5 framework, Bootstrap, Utility APIs, MVC, JavaScript, jQuery, AJAX, Codeigniter, Wordpress, Joomla, Cake PHP, Drupal, Magento, Bootstrap, Payment Processing, API, number of frameworks which are used for web design and development.
I can assure you to provide:
-> Dedicatedly work for 8hours/day and 40 hours/week
-> Give work updates daily/weekly as per your preference.
-> Provide post development support for 2 Months.
Thanks and Regards.
Mustafa