Islamic banking has the same purpose as conventional banking except that it operates in accordance with the rules of Shariah, known as Fiqh al-Muamalat (Islamic rules on transactions). 
Narrated Abdullah ibn Mas'ud: The Messenger of Allah (pbuh) cursed the one who accepted usury, the one who paid it, the witness to it, and the one who recorded it.
For all you long-suffering women feeling like a minority in the sector, here is some inspiration to keep you going.