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, Angular js, Cakephp, Laravel, Zend, Facebook messenger chatbot, Whatsapp chatbot, REST API(Web services), mysql, mongodb, bootstrap, AWS, WOWZA server solutions
Proposed Milestones
£150 GBP - Final milestone