Looking for Web and Mobile App for Classified Ads App

This is for development of mobile apps (Android and IOS) for a classified ads service like kijiji with backend API Only those with relevant experience need to bid, please! Requirements: - Website to be done using MEAN stack. - IOS App to be done in Swift - Android App to be done with Java / Android Studio - Firebase database and services have to be used. What I have: - I have a mobile design sketch and features Our company is looking for only senior developer who can be identified whether he/she is a real person and real expert or not. Because we had bad experiences with the fake person and fake developer, the identification process is very important.