Abstract: Operations of a shift worker platform include receiving a shifter designation command designating an employee of a common employer entity to become one of a plurality of shifters and receiving available shift data generated using an interactive job provider client calendar, the available shift data representing an available work shift of a job provider client of the common employer entity. The operations further include establishing one or more matches between the available shift data and the plurality of shifters, updating an interactive shifter calendar of each of the matching shifters to include a visual representation of the available work shift, and receiving shift selection data generated using the shifter calendar of one of the matching shifters, the shift selection data including a selection of the available work shift by the shifter. The operations further include updating the job provider client calendar to include a visual representation of the selection.