Create a pdf stamper function for ebook pdf files sold using Gambio platform

Client uses the German ecommerce software Gambio ([login to view URL]) and wishes to 'stamp' pdf ebook files with personal information after purchase, before downloading. See here for similar functions on other platforms - ([login to view URL]) and ([login to view URL]). Developers will need to be familiar with Gambio and to integrate this function as a module within the admin interface. The fields to be included in the stamp could be customer name, order number, email address, and they should appear on all pages of the pdf file. Quotes are required initially as the work will not be undertaken immediately.