hello sir,
i'm a full-stack developer, i understand your requirements and i can make the work done in a short delay of time with clear code and documentations
i use the Django framework as the main back-end technology and i can help you to save customers payment information in the database so you can access it via the admin page
i would love to hear more from you and know which payment gateway are you using, so i can assist you with the best solutions
regards,
Firas jb