I have developed apps for 2 startups and have 1 year experience in Frontend, Backend and UX Designing. I have command over backend technologies such as Firebase, PHP and Nodejs. I also have great experience of using 3rd-party libraries and SDK's such as opengl, opencv, and game dev frameworks such as Libgdx, Cocos2dx.
About API's, I have worked on integrating REST API's such as Signin with Facebook, Google+, Paypal, google ads, In-App Purchases, Cloud Messaging, etc. For example in my last project, I integrated Facial Recognition using Kairos API.
I always delivering high quality and well structured code to my customer.