Honestly, be prepared to be unemployed. Else stay in your home country. While a LoC (Letter of Consent) can be gotten, you will need to qualify for it and it can't look like you are taking a lowly administrative job that would be taking a job away from a local. It's not easy.
If, when you say partner, means you are not married, unless your country recognizes common law or de facto marriages, you can forget the LoC as you would have to be eligible for a Dependent's Pass and unless you can get a document from your government that says they recognize the common law marriage as a legal union in their eyes, you will not be allowed to get the DP or LoC.