Sparee - extend functionality of existing web platform

I am looking to extend the functionality of an existing web platform built with JavaScript/React and I have a detailed list of requirements for the project. For this task, I have a specific deadline of it being operational within a month. I require a freelancer with the expertise to complete the extension to the platform within the stipulated time frame and to the exact specifications provided. By collaborating together, I beleive that we will create something special. You can find platform here - www.sparee.pl