Shrugs, military press, pull/chin ups, rows and dips - these are all exercises that target the back region. Maybe add dips and military press to your regime, so you're getting the pushing, as well as pulling muscles. As for the lower part, you probably just need work on tightening your abs/obliques and reducing your bf% slightly.
Only thing is, your muscles are slightly assymetrical (favouring the right side by the looks of it), perhaps try lowering whatever weight you're working with and making sure you're building both sides evenly as you work your way back up.
Only thing is, your muscles are slightly assymetrical (favouring the right side by the looks of it), perhaps try lowering whatever weight you're working with and making sure you're building both sides evenly as you work your way back up.