Morgan Stanley

The interesting thing here is not the New York nameplate but Budapest. Over the 2000s Morgan Stanley grew its Hungarian division into one of Europe's largest sell-side quant hubs, a rare case of a major U.S. bank anchoring core model-development work well away from New York or London.

The division hosts Strats and Modeling, Core Analytics and the model-risk teams behind its algorithmic trading, building the pricing, electronic market-making and risk models that run across equities, fixed income, FX and derivatives globally. The work happens in C++, Scala and Python, the everyday stack of a modern sell-side quant floor.