The deadlift is a predominantly a hip hinge action (basically bending at the hips) - and is one movement pattern that is often really hard to feel that you've got your technique right. In this video I run through a few of the common technique tips that I give to clients when doing any hip hinge exercise (squats involve hip hinge too). So do watch this video if you feel like you need some pointers, or are feeling your deadlifts or squats too much in your lower back - you should predominately feel this work in your hamstrings, glutes and to some degree your back - but not in a 'pain' way.
This video applies whether you are using kettlebells, dumbbells, resistance bands or barbells - the action is the same.
Hope it helps!