Hello,
I have done similar project for one of my UK based client D&S Systems using Ecwid, Quickbook APIs for orders, products, invoice managements with many of other features like SMS alerts using TextMagic...etc. I can share more my work sample with you in chat.
I can develop solution for you by implementing Repsly and Dear Systems with the features you're looking for and also will give you ongoing support. See below more details about our expertise, skills for your reference.
Website development, software development mobile apps development with expert technical knowledge in PHP, Mysql, Ajax, jQuery, HTML5, Bootstrap, WordPress, Joomla, Shopify, Magento, Drupal, Angular JS, ASP.Net, CodeIgniter, CakePHP, Laravel, RestFul/SOAP APIs, Ad Library, Classic ASP, Knockout JS and all the MVC frame work.
Case Study:
D&S Monitoring System: Goal of making this web based system intends our client(Vendor) to centralized and monitors their Ecwid orders, QuickBooks invoice, customer payment status and many more like Generating Invoice, Sending Invoice template by Email, Add new Suppliers, SMS notification through TextMagic email notification through MailChimp. Customers also can track their purchases using this system and reply to their SMS. Basically system is based on Ecwid store management, Invoice management and it saves lot of time of our Vendor.
Please provide more details to discuss further.
Thanks,
Nirav Shah