Build Whatsapp Bulk Messaging Webapp

Build Whatsapp Bulk Messaging Webapp Requirement 1. We want to develop a program which will send bulk messages ( Img-Audio-Video-Vcard)to whatsapp contacts. 2. Should support more than 10,000 to 10, 00,000 Avg. Contacts. ( send bulk messages to whatsapp contacts which 10+ million daily) 3. The program will also should be able to submit messages on a planned date. 4. The program should contact the whatsapp server as a mobile phone number & also web based. Also use our own server. The application should be integrated with our Mautic Marketing server 5. Mobile Filtering, Duplication & wrong Number Check availability. Wrong number/ non-whatsapp number should remove, automatically. ability to filter active contact list with options ( no whatsapp- last seen ), recent activity 6. Customize language and other details ( country wise/ region wise). With Google font integration 7. Worldwide use, Mobile No. save with country code. Creating and saving contact group lists. 8. campaign name with total history like date, timing, content, delivery reports, Mobile Type (android/Iphone/Blackbarry..etc) 9. Import & export Excel / Csv. ( mobile no.) 10. Application should be Light weight & Fast process