Hello,
I have experience doing a similar task like add subscription and integrate payment gateway in NodeJS application. You can have a look at my profile. Let me know when we can discuss.
I am Sr. full stack developer & DevOps with 5+ years experience. I have experience in JavaScript, NodeJS, ExpressJS, AngularJS, MongoDB, MySQL, PostgreSQL, Linux, Nginx, Apache, AWS, Git, etc.
Looking forward to working with you.
Thanks