Build me a node.js api with mongoDB

A imaginary company wants to develop a talent acquisition service to offer its customers. The service needs to support multiple customers and provide proper separation of each customer’s data. The main purpose of the service is to post and manage job applications. A company will register in the system and post job vacancies to which applicants can they apply. Applicants need to self-register in order to apply to vacancies but anyone can browse the open vacancies anonymously.