Because financial translations know no boundaries, people use fintech applications to transact money in multiple currencies. A fintech app developer implements plenty of things to ensure users feel good about trans money by similarly switching between currencies. It begins with creating Perfect UX, a tool for currency, selector, real-time conversion, localization, and your name, just a few critical factors. However, there are some technical aspects that need to be implemented following the best practices. For example, they can use right backend frameworks like Node.js to handle complex financial calculations. Similarly, developers can use PostgreSQL or MySQL databases so that users can transfer money natively in their preferred currencies.