Images should upload in that format when using wp_handle_upload. It is unclear exactly how you are getting http://localhost/job/?attachment_id=40 

I would suggest having something similar to the **Handling the File Upload** section of this post:

 - https://wordpress.stackexchange.com/questions/4307/how-can-i-add-an-image-upload-field-directly-to-a-custom-write-panel/4413#4413