InGame Purchase through payment gateways in Unreal 4.27

Hello, I'm looking for an experienced game developer who can help me with an in-game purchase system in Unreal 4.27 engine. My desired in-game purchase is to implement items or power-ups and I also need a payment gateway to be integrated. Thus, you should have a good understanding of Unreal 4.27 engine and knowledge in integrating payment gateway that should work with playfab store/inventory/catalog. The successful candidate will be expected to build a reliable and secure payment system that can handle transactions quickly and smoothly. I'm excited to know how he or she will come with creative ideas, construct a solid code, and give guidance throughout the development process. So, if you are interested in this project and think you have the abilities to meet the high standards of this project, please don't hesitate to reach out. I'm looking forward to working with you.

More details-
Our game got an inventory and a virtual currency which is on playfab and catalog items can be purchased through a virtual currency from the game. What we wish is to purchase/top-up that virtual currency from game through a payment gateway interface involving debit/credit cards . And we need it for all platforms like, PC/Android/iOs/Steam/EOS