Highly recommend checking out materials from Nubank, the Brazilian banking startup that now owns Cognitect (and therefore Clojure). They have several hundred en

Highly recommend checking out materials from Nubank, the Brazilian banking startup that now owns Cognitect (and therefore Clojure). They have several hundred engineers on the back end working almost entirely in Clojure. Believed to be the largest Clojure plant, though many other large orgs now have sizable Clojure staffing. I saw some of the Nubank folks speak in person in NYC before the pandemic (and before the acquisition of Cognitect) and it was hands down some of the most impressive work I've encountered. Little in the way of macros, just functions and data. What they have done to scale a Datomic infrastructure is astounding. They have quite a lot of materials online. Worth some time. Now that the Cognitect team is essentially embedded and more resources are going into core, I imagine at scale tooling will see some enhancements in the coming years.