TI
Designing opportunities+ Java + AWS + high traffic? Nowhere. You can pick one or maybe two of those at most. If you are looking for all that then it isn't the right place for you to work.
It is definitely possible to find places in Bloomberg to learn and grow, but AWS (or any public cloud) is not in big favor at Bloomberg - we are known for DIY approach to infra. High traffic - definitely not in terms of human users - hard to have a lot of users when yearly subscription is 25K+. Anything dealing with intensive streams of market data is probably the closest, so Trading and Analytics. Java is used a lot throughout Bloomberg.
How to discover teams? Can you recommend any.
Global accelerator and hyperplane are critical ones as far as i know