Quote from sjfan:
Just so that you know - the vast majorities of quants get stuck in back/middle office risk and portfolio construction. These jobs pay very very well, but they don't lead to trading or portfolio management. But most quants are perfect happy in those roles. The quant world, oweing to its closed ties with academia traditionally, is a very elitest one on par with Goldman's banking groups. Where you went to school will matter a whole lot.
That being said - few quants end up being quants without grad school. Moreover, forget what you hear about majoring in physics. That's very much over with. Most respectible phd programs now have finance, which is specialized enough to stand on its own.
And no, actual quants don't development ma systems.