[vgatherps]

This is almost certainly incorrect, unless it’s using a very stretched definition of “hft” and using microseconds to mean 99th% <1ms instead of say <5us (reasonably competitive software range depending on your trade).

They might be forwarding non latency sensitive client/internal orders through a system written in erlang, or using erlang for an orchestration layer, but they’re not competing with other hft traders in one.

Source: I work in the field and have built <5us systems.

https://m.youtube.com/watch?v=NH1Tta7purM Is a free great watch about the things you have to do to very reliably have such low latencies