Need to develop a b2b web platform with android and iphone mobile app

Need to develop a b2b web platform with android and iphone mobile app I will prefer developer from delhi or nearby delhi and must have experience on big project what work needed in project: 1. Front web design 2. Frontend development for user 3. Backend design 4. Backend development for client 5. Backend development for admin/owner and staff 6. API creation so that other platforms can use our service using api 7. Payment gateway integration 8. Online Adharcard verification system using api 9. Pancard verification system using api 10. android and iphone app for user 11. android and iphone app for client project will be in 3 part 1st part beginner - budget have 100000 2nd part api and app creation - budget have Rs150000 3rd part Advance configuration in app as well in web (need to complete the project ) - Rs150000 All work need with testing and bug free (and should be standard coding and UI/UX design) , with high level security ( can't be scrapped data, or can't be inject malware or low probability of attack) , need to design db and need to code in such a way that crores data can be handled and monthly millions traffic can be handled. Later maintenance work will be given to the same or (against maintenance work , we can offer some partnership share if interested)