Node.js MongoDB, express.js for backend small development

i'm mobile developer , I have to develop an small application, but you have to do only backend work, and use node.js, with MongoDB, express.js tools in back end, you have to provide complete backend and API,

i will provide you live apps application , In terms of that you have to build the whole backend

Apply to discuss here only what is express for you more than 5 years in node.js MongoDB, express.js development