Adjustable organizer shelf system and assemblies for use with an appliance are provided. Shelf assembly includes a pair of brackets and a fixed shelf mounted between the brackets. Shelf assembly also includes a movable shelf with a pair of rear lower hinges and a pair of lower guides. Shelf assembly also includes a lifting arm assembly attaching the movable shelf to the brackets. The lifting arm assembly can include a pair of lifting arms attached to each of the brackets. Lifting arm assembly also include an upper rear hinge affixed to each bracket, an upper guide affixed to each bracket, and a roller disposed within each of the upper guides and lower guides. The end of each lifting arm can be fastened to one of the rollers disposed with each of the guides.