This module may help you 2dx_hr_recruitment, you can check on apps store.

Hi,

Actually, the recruitment contains a stage, and that stage used as a many2one field that is the stage contains in the model hr.recruitment.stage based on this model it will pass in the data file

for eg: you can add your own stages in the data file like

            Received Application

            1

this is for already available stage changing, if you need to add extra stages you can follow the below code

>
            Stage Name
            5
            Falsefield>
       

you can add this way in the data file

after adding each stage you can add the button base don the stages