Custom WordPress Plugin Development

Need A Custom WordPress Plugin. -------------------- This is a plugin for re-engaging the visitors by showing browser tab notification (blink the tab title and favicon). Example of Facebook. When you browse Facebook and if anyone sends a message. If you are browsing another tab then facebook tab showing a flash/blinking message. Real-life example: [login to view URL] Open this website and after loading the site go to another tab. And see the action. We are expecting the same action on our plugin. And the plugin users can customize the message, time, interval and many more... (which are list below) ===================== * Notification Message * Notification sound * Notification style * Favicon icon * Timing and interval * Action for return visitor (Ex: redirect to another page) * Snooze (cookies system for not bothering for users) (this is our main feature, maybe some minor features will be added later.) Others Requirements: ==================== We plan to sell this plugin and we will use an EDD license ([login to view URL]) for only real buyer filtering. We want our license system included with this plugin. Our license system will be - ================== * Single site license * Unlimited site license (This is very important for us to use our plugin only for the real buyer. Plugin interface idea and other info will be provided after the interview.)