Hi Sir,
I have gone through you project description completely. As far as I understood that you are required a simple sleek User friendly music library managed by users like Sound cloud and the additional features is the "DJ mixing" to the user who uploaded the track. You have already that script that just have to be integrated. But need to design the script interface, where it will perform.
The login with social media like facebook and twitter will be easily handled with their APIs and the notifications system will be designed separately.
We provide our honorable clients a 24/7 communication service via Skype or Freelancer chat. You can see our complete portfolio at ArhamSoft . com. Some websites related to your project are:
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ArhamSoft is web, software and mobile app design and development company, operative since 2001, having strength of more than 50 employees. We have teams of dedicated designers and developers with high level of expertise in PHP, CodeIgniter, CakePHP, PyroCMS, Yii, MySQL, Memcached, MSSQL, NoSQL, HTML, DHTML, CSS, JavaScript, AJAX, JQuery, JSON and XML.
After seeing our rating on Freelancer you can see that we are dedicated to possess the top rank by providing state of the art solutions to your problems at reasonable cost.
I appreciate if you can take some time off for me to discuss your project in details.
With Regard,
Ahme