If you don't have a resume for a candidate yet, but want to consider them for a position you can manually add their details to a job.
Navigate to one of the job's stages. Click Add candidates in the upper right.
Enter the candidate's details in the form that appears and click Create candidate.
Important: The candidate will be added to the stage that you are currently viewing. Make sure that you are looking at the relevant stage when adding the candidate.
You can add a resume at a later time by editing the candidate's profile. Open the candidate's profile and click the three dots and the top of the profile and select Edit candidate in the menu that appears.