Hi! I've seen your requirements and I'm interested in it, I have expertise in PHP (cakephp,CI,Zend) and Clientside (jQuery, Angularjs, Angular2, Typescript) and have highest reviews for jQuery (frontend) at freelancer.com. I can code OO Javascript and I can use the provided RestFul API using Angular2.
I can show demo code for typescript for angular2, let me know if you are interested, I'm also expert with Ionic. I can work with your RESTFUL API, and Token based authentication + session.