Project in nodejs

I am looking to hire a freelancer to build a web application using nodejs that is scalable and stores user data. The user data will not be limited to anything specific; it could include profiles, preferences, etc. The goal is to have the application easily support an expanding number of users. Needless to say, the project must be completed with precision and accuracy. Experience in developing scalable web applications is an absolute must. I'm expecting the project to be top-notch, error-free, and capable of supporting various types of user data.