Nice. A few years ago we‘ve build something along these lines at Technicolor: <a href="https://medium.com/@rad_g/the-ultimate-reactive-infrastructure-557fe8417caa" rel="nofollow">https://medium.com/@rad_g/the-ultimate-reactive-infrastructu...</a>
I can imagine that our solution wouldn‘t work at facebook scale but for us, it was a massive timesaver, in 300 lines of ruby code.