Developer needed for LMS

We offer a course in Moodle and some of our customers request an API integration for their website that allows their clients to fill out a registration form on their website, make the payment and enroll in our Moodle course automatically. When a client fills out the form and makes the payment, he/she receives an email including an auto-generated user name and password for Moodle access. They can change the password after first logging in. If the payment phase is complicated, we can remove and offer only registration and auto-enroll to the course.