We need our Opencart module improved

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
We have an Opencart module which the link provided below and it needs to be improved with some functions.

* We want to add serial keys in bulk to previous orders (preorders) easily. Currently, we're entering serial keys to every preorder one by one so it takes so much time.
* Currently, we can assign keys to main products only but we need to assign to serials to sub options of the products too.(Like, Windows is main product but we want to add the serials as Windows Prof.Edit., Windows Limited Edition, etc, we don't want to create many products with every option)
* Currently, we upload the serial key photos to cloud sites and enter the links to this module but we want a function so we can upload the photos to our store too.


Skills required:
PHP, Software Architecture
About the employer:
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