Custom a payment solution for Joomla component ?

Hello Devs,

I need to custom a joomla component for my business. In fact, i have payment solution i need to integrate in the component KO! Custom Gift Certificate (gift card component).

For now there is only Paypal (so code is available for that if needed) and i wish to install a new payment solution. My bank gave me all stuff i need to know to install it but i don’t know how to do with that component.

Is there any dev that can assume that kind of quote ?
If yes, can you tell me how much it costs and let your email in order to contact you ?

Thank you for your help.
Best regards.