You can find and organise your job assignments by clicking on Menu, then My Jobs. You will then see pending, active and completed assignments. Pending are the assignments you applied for but are not yet hired. Active are the job assignments in the future you got hired for. Competed Shifts are the job assignment you already completed in the past. There you can also check whether the timesheets for a certain job assignment are already approved by the employer.
Furthermore, under "Menu" > "My shifts", you can find and sign all your work contracts, see your your daily work schedule in a calendar overview
or chat and call your employer.