Comment by koliber

In the broad picture of engineering, I would consider this to be technically difficult. Many pieces of the puzzle need to interact correctly to remove latency, from physical location, network gear, decision about where software runs, removing unnecessary layers of everything, to algos and data structures, and doing razor-tight tradeoff analysis favoring low-latency at every step along the way. It’s also expensive. So it’s hard to agree that this is not hard. On the flip side, if you find this easy and want a job, msg me.