I worked on similar things last summer. My concern is with taking the job, while continuing to look around for a better one. Is that immoral? It is at will employment, so I can do that. I just do not think anyone will pay as well as this bank.
What makes you believe the best reward for you right now is to be paid as well as this bank, instead of improving your learning rate?
That's actually pretty standard. Always keep your ear to the ground.
"Best time to find a job is when you already have one."