what eCommerce system do you plan on using to accomplish the billing / ecommerce functionality
Considering your question, if you already have a Drupal website, I suppose it is better to create an e-commerce website either with a Drupal Commerce module or an Ubercart. In any case, it will be better to discuss your project in more details and only then to offer you the most relevant technology.
Proposal:
Hi there,
I am Nadiia Kerymova and I’m with WI Communications. If you are looking for experts in software and web development, we are at your disposal! Our web agency mission is to provide individuals and businesses with accurate and professional IT services at an affordable price in the fastest turnaround time.
I would be glad to provide you with the frontend developer to complete your Drupal website. He is adept at HTML, CSS, and JavaScript. Moreover, he is familiar with CMS (specifically, WordPress, Joomla, and Drupal), different e-commerce platforms and frameworks like Bootstrap, Foundation, Backbone, AngularJS, and EmberJS and libraries like jQuery and LESS.
Please, drop me a line in the chat and I will connect you with our frontend developer to discuss the projects in more details.
Kind regards,
Nadiia