Senior Web and Mobile Developer

Description:
I need an app and software that will be integrated into existing API.
For the app I need the following:
-location services (to find the location)
-payment (ability to pay from apple pay, wallet, etc)
-See how many items are in stock

Category: IT & Programming
Subcategory: Apps programming. Android, iOS and others
What is the scope of the project?: Create a new app
Is this a project or a position?: Project
I currently have: I have an idea
Required availability: Part time
API Integrations: Social media (Facebook, Twitter, etc.), Payment Processor (Paypal, Stripe, etc.), Other (Other APIs)
Required platforms: Android, iPhone