The ends of the spectrum of the shown chart are not what I would consider in the wheelhouse of a "developer". The top of the list is systems administration and

The ends of the spectrum of the shown chart are not what I would consider in the wheelhouse of a "developer". The top of the list is systems administration and the bottom of it is project manager and graphic designer. A front-ender needs to know enough Photoshop and Illustrator to take comps and turn them into templates.