prestashop php guru

We need a php developer to create an integration module and hook it in to our existing prestashop website to connect with our credit agencies online application portal.

Needs to work with our current prestashop site running v1.6.0.9

Also would need to be able to calculate finance deals on product pages in a pop out box.

for example click the finance box on this page on a competitors

In checkout would need to let customer choose finance product (apr/term) and choose deposit amount.

Current finance products we are offering

6 months interest free 30% minimum deposit (select products, needs to be able to be disabled on certain products)
12 months 9.9% 10% minimum deposit
24 months 19.9% 10% minimum deposit
36 months 19.9% 10% minimum deposit
Minimum £500 spend to apply for credit.

Do you think this is something you could help with, also what would a rough cost be?