SAN FRANCISCO — The plaintiffs attorney behind the driver suit that Uber Technologies Inc. just can’t shake is at it again. This time her targets are food delivery services GrubHub Inc. and DoorDash Inc.

Shannon Liss-Riordan, a Boston-based employment attorney, filed complaints Wednesday in San Francisco Superior Court, accusing the two companies of improperly classifying their delivery drivers as independent contractors and denying them employee benefits. Both companies illegally force their drivers to pay their own work expenses, including gas, vehicle maintenance, parking and cellphone data, according to the suits. GrubHub also pays its drivers below minimum wage and denies them overtime pay, according to the complaint.