For hedge funds that are active position takers and not trading at very high frequencies, Python should be fine. For high-frequency trading firms aka market mak

For hedge funds that are active position takers and not trading at very high frequencies, Python should be fine. For high-frequency trading firms aka market makers, C++ is used heavily. Python is much easier than C++, so I suggest starting with it, augmented by packages such as NumPy and pandas. You could ask your question at the Wimott or NuclearPhynance forums (after checking if a similar question has been asked recently) and check what job ads at eFinancialCareers specify.