I spent two months and an half in Perth. For job is TERRIBLE. I used to stay in a hostel and almost everyone was complaining for luck of hours. Usually backpackers work in hospitality and constructions. I met so many backpackers not working full time in both the fields. I met backpackers that didn't get a job after one month!. It's hard to find even kitchen porter job! Many backpackers in Perth are out of work or they work but just a few hours. Actually backpackers are struggling everywhere in Australia, but in Perth much more. Western Australia is in recession now and even Australians are struggling. Avoid Perth. Land in the city, visit it, but start your job hunt somewhere else. Avoid this city...It's not the place to be. I was there from November 2017 till February 2017.
