Systems, methods, and computer-readable media are disclosed for fully automated order fulfillment. A method includes identifying a shelf tote having an item contained therein for transfer to an order tote; dispatching a first carrier to pick up the shelf tote and a second carrier to pick an order tote; causing the picker to pick the item from the shelf tote while the shelf tote is moving through the transfer station; and transferring the item to the order tote by the picker.