Hello.
I have built many cryptocurrency project to exchange, transfer, mining etc so have rich experience in these skills with bitcoin, ethereum etc.
So I am sure I can do you project well as you need.
Which stack do you want to use to implement this payment system? Node, PHP, Python?
Do you have design for frontend?
Please let me know about it.
If then, I can start working and will get back to you with good result.
Please send message for further discussion.
Thanks