Hello! Concerning your requirements.. I have experience in Postgresql.
You need serious bidders but you suggest not serious budget. If you need real and professional help, please, contact me. I have bid my rate per hour.
My skills:
I am a senior php(Symfony, Zend)/JavaScript/html/WordPress and WooCommerce/Magento/Drupal/Joomla developer.
Also I have a huge experience in working with different CRM, css, css3, jQuery & Prototype, Bootstrap, Prestashop, XML, MySQL, Postgresql, database administration, database development AJAX, API and Payment Gateway Integration.