Working as software developer in Financial Service Company Paytm?

Salam Alikum,
I recently joined a company called Paytm. Basically because of the brand name and the amount of experience that I could get is Huge. The company brings about half a billion Indians as its users. It helps them pay their bills through their platform. But recently they have also started Paytm bank(2.5% interest per annum) and the stock market. And I am working with the team building the stock market and gold investments. Is it permissible for me to work in these to build a stock market application? The application may have companies participating that are unlawful to sharia and earn through Interest