I have already developed Drupal website, I am installing it on the new server, and need to integrate Purchase form a drupal, to send purchase to DB (it enter user into Firebase on different IP from the website), and to return back in Drupal with user details confirmation.
Developer version example I can show you, currently works in Demo version.
I am using 2CO one page checkout, Firebird DB (Interbase) for user accounts (user accounts are not used in Drupal, they are used for the separate software, Firebird is not DB for Drupal it is used for different application. Drupal is only webstore that enable user account purchase)
Website is hosted on Linux CentOS dedicated server.
Ideal candidate is person with excellent PHP skils, knowledge of Drupal, knowledge of Interbase integration, knowledge of linux dedicated server.
If you have experience with Firebird and PHP, please bid if you're confident