Work - find a job in the financial sector

Well, there MAY be some jobs in the financial sector that do not require German language skills, but (as in all other industries) they are hard to find. All roles facing customers or partners, or anything needing communication with others, is automatically ruled out, obviously. You should thus focus on the few that don't require this.
Another aspect is that, without speaking the language, your social life will be quite restricted, even in big cities like Munich or Berlin (or Frankfurt, the financial centre of Germany).
Visiting these cities only makes sense once you're invited to a job interview. It usually takes months between a job opening been advertised and the successful applicant actually starting work.