Hello,
Upon reading the job details I would say that all the required skills NoSQL Couch & Mongo, Backend Development, MongoDB, Node.js and JavaScript fall under my skills. I work on freelancer full time and I believe I can do this job if I get all the detailed requirements. Please check my portfolio as well: https://www.freelancer.com/u/AwaisChaudhry?w=f
Looking forward to your response. Awais