API to Salesforce sync

Our app is a personal concierge service so Users are placing orders from Vendors and our Butlers are delivering the orders or Service Providers are performing the order (eg. massage). We need all of the information from these transactions to be sent to Salesforce. Details about API: We are using parse.com and the languages we are using are objective-C for iOS, java for Android App, asp.Net for website and angular/node-js for admin panel. Parse itself handles the API process. Our current consultant used Java as the basic framework currently in place.