Now for the development of programs for financial companies, etc. I advise you to contact a company that specializes in such services, so that they can easily solve the problem in the development that may arise. The same in the company should be experienced financiers so they can explain the programmers how the function should work. Ask for financial services software development https://owlab.group/our-expertise/finance-banking to this company at this link. They have a lot of experience in developing such programs.