Here I will discuss not only about job opportunities but also about how you can earn money after MSc in math.
After MSc, you have two options (i) Further study-PhD (ii) Job
i) Further study
You can go for PhD and earn 25000-35000 per month plus accommodation for four-five years. After PhD you can go for Post Doctorate and earn 30000-45000 per month plus accommodation for 3-4 years.
Go for lectureship in good institutes and earn nearly 35000 per month. For other jobs, this may help you http://gonitsora.com/top-paying-mathematics-related-careers/