It is generally a good idea for you to be past your employment probation period before applying for a home loan. This is usually 3 or 6 months, depending on the terms of your employment contract. Some lenders will make concessions if your new job is similar to your old, but it really depends on the lender and is usually evaluated on a case by case basis.
An Aussie Broker can help you through the steps of gaining approval for a home loan. This service is part of your free appointment with an expert Aussie broker.