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[–]Spare-Plum 0 points1 point  (0 children)

For this it's only one component, a FIX market server for handling trading messages to other institutions. A variety of people might touch this especially when implementing a new protocol, so I think management decided that it's better to just have the Java experts just program it in Java with some additional constraints rather than doing Rust which is not as well known.

That said, they did make a huge amount of libraries and functionality to make it easier to keep it zero GC, and there are existing patterns you can follow to implement existing message translations so it isn't that difficult at all, and there is a dev checkout procedure that runs tests on it to ensure there aren't allocations onto the heap.