You can learn COBOL. It will be like swallowing a barbed cube shaped pill. That is not the hard part. Many of the bank systems are 20, 30, 40 years old and are

You can learn COBOL. It will be like swallowing a barbed cube shaped pill. That is not the hard part. Many of the bank systems are 20, 30, 40 years old and are swamped with technical debt. They have been modified, extended, updated, moved to new hardware over and over. Documentation, if any, is hopelessly out of date. The existing programmers are proud of what they have accomplished,the software system works!