I'm sure that on the Internet you can find many similar offers, but among all fintech software development services, you must choose the real best and most profitable for you. I know that not all companies are equally good at this and if you don't want to get into trouble due to bugs in your business software, then it's best to find and select a company from the list of the best professionals in this field. I can offer you several sites where you will find a description of such companies and a portfolio of their work.