hi mate, I am professional backend developer, I have worked with "heavenya" app available on app and play store, I have worked with API's endpoint(node js +express+ mongo db) and socket's event(socket io) as well. In my previous project, there was a requirement of fetching the data from database and then convert it to CSV, so I have an experience to deal with CSV, I think I can provide you the best solution for your work. you can contact me on private chat for more details.