Hi,
I have a lot of experience on Linux and its command line tools - in your case this will prove valuable since those tools excel on tasks like these. Aditionally, I have more than 4 years work experience on scripting languages (3+ on PHP and 1+ on Python+Django).
Currently I'm working on a big codebase made in Java, and I've managed to get used to the code really quickly - I have an instinct when it comes to understand the internals of an app, so I think I might be able to help you quickly with the recovery of this data - provided that the deleted data is in the backups you have.
Regards,
Eduardo Grajeda