Need a Node Js expert Search Filter Implementation very quickly

Need a Node js developer to do two things for me very quickly. 1. Implement a search filter backend for our mobile app. The existing ones wont work effectlively. I will provide you with a user story document. that has all the checks you need to do. we use mongo Db for backend 2. once this is done. We are plannign to launch our app. however , i need your help to migrate this code to the production server which is on digital ocean. The actual developer who setup this code is not available. so you need to find a way to have a copy of thsi code on a differnt server which we are going to consider it as prod. and the existing one will be used as test/dev My budget for doing these is 70 + 30 USD