Dear Mr. Suter,
I carefully read your requirements and I will be glad to help you with your project.
Do you mind to use python instead of php for this work? I think is much more suitable to accomplish this kind of task.
I have a wide experience with PHP (YII and Laravel 4 frameworks), Javascript / Jquery, Python and SQL and RDBS programming languages. I've also previous experience with .net languages and classic ASP.
I'm also proficent with KnowledgeTree DMS, WordPress CMS, Prestashop, Opencart, Joomla, Magento and many others open source CMS/CRM/ERP packages
I'm also very good in linux system administration actually managing 5 linux servers most of them on AWS (a couple of them act as streaming server).
I'm strongly focused on results and aspire to deliver a pixel perfect, slick and bug-free product.
If you would like to discuss about your project please don't hesitate to contact me anytime.
Best Regards
Simone