The Swing API and toolkit are heavily used in developing trading application front end in Java on both large Investment banks and small broker firms. Doesn’t matter whether it's a front office or middle office application, you will find Java Swing GUI everywhere. The Swing-based GUI is used to develop an Order entry system, Order monitoring GUI, and other tools that trader or operations can use on different trade life cycles in the front office. middle office and back-office space. Due to its heavy usage, there are a lot of requirements of Java Swing developers in investment banks like Barclays, Citibank, Deutsche Bank, Nomura, JP Morgan, Morgan Stanley, and Goldman Sachs, etc.