A good friend of mine who worked on a CICS based credit card processing application at that bank doubled his salary twice inside of 4 yrs. First by quitting the bank and going to a boutique consultancy to build competing software (which they sold to other banks) and then by quitting that job and coming back to the bank to takeover the abysmal state the CICS app had lapsed into in his absence.
And that was circa 2010.
One thing that was true of the bank then and I'm sure is true now is that when they see a nail they truly have just the one hammer. When a problem comes along, hit it with a huge sack of cash until it goes away.
Tandem! Now there's a name i haven't heard in a long time. A college friend of mine worked with some of their stuff right out of college and I still remember him telling me about it. It seemed like magic, we were both floored with the capabilities.
/we were in our early 20s and the inet was just taking off so there were lots of "magic" everywhere
https://www.youtube.com/watch?v=SSSB7ZTSXH4
The Remarkable Computers Built Not to Fail by Asianometry
Huge generalizations incoming, there are exceptions to every rule, but in my experience there are no nerds who love tech for tech's sake in the banking world. It's entirely staffed by the "C's get degrees" crowd who just want to clock in, clock out, keep their head down, and retire with a nice pension.
I wanted to work on sexy technology, wrangle clouds, contribute to open source, and hack in modern languages.
I have many friends who are still at that bank 20 yrs later. They're all directors of this that or the other thing, still just grinding out some midlevel whatever career and cruising comfortably. If that ticks all your boxes then by all means go hit up a bank job.
By the time I left I couldn't drink enough liquor in a day to rinse the stench of that job off me. If I hadn't managed to slip that place I'd be dead of liver failure by now.
It's the secret for a long life for some folks, but it ain't for everybody.