Data from cvs to functions / multiple data / batch

nelson artunduaga

I have a question, in my front end I would like to offer an alternative to our customers where they can upload a CV and this CV is processed in my backend. 

The service with which we want to do this, is a pre-filling of documents so we are interested that if the customer needs to fill more than one document, they only need to upload the Cvs.

How is the best way to start to get my backend to run the different functions in batch, or how should I start?