Integrate Paysera Checkout/Recurring with WHMCS

Hi, We are looking to have Paysera Checkout/recurring payment gateway integrated with our WHMCS installation. We are looking to have a full payment gateway module that can be easily integrated with WHMCS and not getting affected by WHMCS updates. We should be able to have the following: - Use it to take payment through our checkout page on the website. - Get notifications the same as any other native payment gateway. - Be able to make refunds as mentioned in Paysera documentation for API integration. - Have Credit Card details saved on Paysera servers and tokens created for recurring payments. Paysera documentation for API integration can be found here [login to view URL] And WHMCS documentation for merchant/3rd party payment gateway integration can be found here [login to view URL] We need the project to be delivered in a timely manner and in a professional way. Please don't bid if you are not familiar with this kind of integration as we are looking for the best results.