Hi, your project seems a little bit more complex and should need proper attention at all details. I estimate the project to cost more time and so i made a realistic offer. I can help you get your solution in place to meet your needs.
I worked before with PayPal, social logins and web services. I've been creating PHP systems for websites for almost 6 years. All code is clean, up to date, and easy to understand.
Background:
I am a programmer from Romania, finished highschool and university in informatics/math. I've been working for the past 6 years in web development. I work both in .Net and in PHP. I've worked with some frameworks(codeigniter, prestashop, wordpress, and .net: webforms and MVC) and i also have my own framework(simple and efficient model view controller based framework).
I work part time at a company in my hometown for almost 4 years, and rest of my work i do in freelancing.
If you want to give me a chance dont hesitate to message me