I want to advise you fintech mobile app development company
https://surf.dev/fintech-mobile-app-development/ , which is chosen when it comes to the development of mobile banking and trading applications. They can take on an application of any complexity, they also develop applications for projects of famous companies, which indicates that they are chosen by the best! So if you want to be among them, go to the website of the guys, check out their work and write to them!