Building a joomla plugin

Hello, I need an plugin to be developed. It will integrate joomla with Allopass. What you need to do: You need to use Allopass API (i will provide) and create buttons for payment. There should not be no code written in article page where button will be placed. e.g: you need to send following things to Allopass: price, redirect URL (anything else needed) Then upon sucessful payment, it will be redirected to that URL. So the code in article should be something like this: {allopass: payment_amount,redirect_url,etc,etc){/allopass} I will provide more information to selected candidates.