Overnight Dog Sitter/Dog walker

I need an overnight dog sitter to come and stay at my flat 3 nights a week whilst I am at work.I work nights every Sun,Mon and Tues and the sitter will need to walk the dogs once at night then again in the morning (15/20 mins).The applicant must be able to provide references and be confident in handling animals.The hours will be flexible but will be around 10pm to 7am