To send a file, you can use the Attach file feature in the Interview Requests view (see picture below).
This is useful for sending offer letters, employment contracts or technical assessments.
To attach a file in an open conversation with a dev, click "Attach file" in the message box.
Once the upload is done, the filename will appear in the message bar.
Then hit “Send” and your attachment will be sent.
This means that instead of sending an offer letter or technical assessment to a developer in a separate email, you can simply pop him/her a message with the attached file in your ongoing conversation on OfferZen.