Hello,
I'm interested in your project, not sure that I'm most suitable candidate, but we can try. I've done a lot of projects related to AWS infrastructure, have used most of major services (ec2, s3, rds, ebs, balancing, data pipeline). I've done some projects related to different API, but, all of them were written with PHP. I know JavaScript, but for front-end, and never did something serious with server-side JS technologies and frameworks (like node.js). But I'm ready to learn it, I guess nothing extraordinary there.
Whatever, send me more information about your project.
Feel free to ask your questions.