How much salary should I expect?

I am currently working at a product based startup as a full stack developer (Spring Boot + React Native) with 1 year and 3 months as a full time employee and 8 months as a backend developer intern in the same company. I am also handling their website (React JS) and DevOps. How much salary can I expect if I change my job rn. I prefer Backend development for the new job. Reason for Job change: The product we are building is pretty big and only 2 developers are there (one react native developer and me). I have to work 6 days (9hrs a day including breaks) and overtimes too. Also have to work on multiple projects on same time