Either way you should invest in a device such as a sitfit cushion, this will encourage movement. Getting your core muscles engaged while sitting will work towards developing and maintaining a stronger back.
Movement while sitting will also improve oxygenated blood circulation, great for recovery and keeping fatigue at bay.
Get an eye test! Poor eyesight can attribute to awkward body postures being adopted at the workstation, as a guide, the computer screen should be approximately an arm’s length away from your sitting position.