I have gone through from your description and can do this work comfortably. I have 6+ years experience in development and i have done lot's of project in my development career.
Relevant Skills and Experience
IOS, Android,PHP, Node.js,CodeIgniter , Angular js, Cakephp, Laravel, Zend, Facebook messenger chatbot, Whatsapp chatbot, REST API(Web services), mysql, mongodb, bootstrap, AWS
Proposed Milestones
$12.5 USD - First Milestone
$12.5 USD - Second Milestone