Hello,
I will build WHMCS module for you and also implement any of APIs(REST/JSON) you want. I can share my work sample with you in chat. PM me more details to discuss further.
Relevant Skills and Experience
PHP, Mysql, Ajax, jQuery, HTML5, Bootstrap, WordPress, Joomla, Shopify, Magento, Drupal, Angular JS, ASP.Net, CodeIgniter, CakePHP, Laravel, RestFul/SOAP APIs, WHMCS and all the MVC frame work.
Proposed Milestones
£250 GBP - Default