Need to develop an PHP script with this capabilities .
1- send bulk messages to whatsapp contacts which 1+ million daily.
2- ability to import/export bulk .txt contain mobile numbers
3- ability to filter active contact list with options ( no whatsapp- last seen )
4- ability to have language files to add more then 1 Lang
5- ability to add/remove mobile numbers / IMEI , to send messages from .
6- ability to customize send messages and customize how much message to be sent hourly and which numbers used to send the message from .
7- ability to view recent activity and messages history
8- ability to have user sign up
9- ability to add administrator / multi administrators .
10- ability to support the script for any updates later on which can be made from whatsapp end . ( will be paid when doing but it will be needed URGENT when needed )
11- ability to set number of message for each user to send
12- ability to set mobile number dedicated for user/s
13- ability to set mobile number for share users
14- ability to link it with online payment gateways such as ( paypal-2checkout)
15- ability to make a full web design customization
16- secure the data .
17- ability to upgrade the script later on ( updates will be paid when doing )
Those are basically our needed specs.
Please set your price / time to deliver project.