Hey there,
How are you doing? I understand that you're using 2Checkout as your payment gateway. I have taken note that you want to enable multi-currency checkout as well as integration of 2Checkout into Bold Cashier checkout. I completely get the picture that it will require custom coding, which I am happy to do.
I have been doing web development for the last 8 years, and have worked on many projects. So I can surely work on this project. If you have any questions, please let me know. I am looking forward to your positive response.
Sincerely,
Talha