We want to build a freelance marketplace (like Elance) using Symfony2 framework. If you have a robust auction platform that you have already built in a different PHP framework, we will consider looking at the demo and reviewing your code. We are not looking for unreliable freelancer scripts that can be found in abundance on the web. We already know about them and we are posting this project only after reviewing all of them.
We have an existing Drupal 6 site that will be the 1) front-end of the system; 2) host buyer and seller profiles; 3) authenticate buyers and sellers. We, therefore, would like to know how you intend to integrate the auction platform with Drupal.
Please respond by providing: 1) references sites of previous auction systems that you have built; 2) list of features that you can provide in an freelancer marketplace (escrow, handling of disputes, types of payment gateways that will be supported, etc.); 3) how long it will take you to deliver a system; 4) how your marketplace application with interact with Drupal both on the database level and on the application level.
Please don't list irrelevant websites in your response. We are only looking for experienced developers who have developed auction systems in the past. Please respond to the questions posed with great deal of specificity to show that you understand the project and possess the necessary expertise.
Ecommerce, PHP, Symfony, CakePHP, Drupal