Career options after Masters in mathematics outside academia
This question will probably be closed as it is shopping. You might want to try and learn what people do after having bachelor's in mathematics. There are statistics online and, to my suprise as well, mathematics seem to bring in a quite respectable salary (on avarage, in US). My understanding is that there is some demand for mathematicians in certain jobs. They may train you so you don't really need to know much beforehand. 

Given your specific interests a more ideal, non-academic, job placement would ideally use your qualifications. Private companies do have their researchers (for example IBM has researchers for quantum computing) doing serious research. There might be oppurtunities for you, that I am aware of, in communications (coding theory) or data analysis.