If you intend to live in SG for the long term, yet prefer to work 2 jobs so you can have more stable finances, you definitely need to be thinking about processing your Singapore PR application as soon as possible. This is because in general, a PR can work 2 jobs as you will have largely similar rights as a full citizen. Let us explain more below.
If you are a public or civil servant, meaning you work at a government related organization, you are almost always barred from moonlighting, or working 2 jobs. This is case for both citizens and PRs. For those who are civil servants but want a 2nd job for extra income can try appealing, and sometimes it is approved on a case by case basis.
If you are working in a private company, then it depends on your employment contract with the current company you are working with. There is no hard and fast rule when it comes to this for permanent residents, and it is almost entirely a private matter between you and the company.
The biggest difference between those people who have a resident status and those who are holding any kind of employment pass is that the former can still stay in the country indefinitely regardless whether they still hold their job, can switch jobs readily and can also work at more than one subject to the above disclaimers. However, the latter is almost exclusively barred from taking on any work other than the one that their pass allows them to.
Singapore is very popular among young couples, and yet the country is not the cheapest place to raise a family in. While there is no doubt that Singapore is one of the best places to start a family, it is far from the cheapest. Therefore, many people have concerns when it comes to finances, and want to be more than prepared and wanting to know if a PR can work 2 jobs is a highly justified question. Rest assured, unless your contract specifically prevents you from doing so, or you are working at a government related organization, you definitely can work 2 jobs.