I have not worked at the scale discussed by Joseph Wilk, but I am pleased so far with my ability to build out micro-services with Clojure. The eco-system around

I have not worked at the scale discussed by Joseph Wilk, but I am pleased so far with my ability to build out micro-services with Clojure. The eco-system around Clojure seems to get stronger every day. I'll mention a few of the libraries that I'm using. For building out a RESTful API, I found Liberator to be very clever and original: http://clojure-liberator.github.io/liberator/ http://clojure-liberator.github.io/liberator/ For handling internal queues, I use Lamina: https://github.com/ztellman/lamina https://github.com/ztellman/lamina For instance, when saving something to the database, I usually put the data in a closure, put the closure in a Lamina "channel" and let some workers execute the closure when the thread-pool and IO constraints allow. I just started experimenting with the Ribol conditional restart system, for error handling: http://docs.caudate.me/ribol/ http://docs.caudate.me/ribol/ For the integration of frontend with backend (MongoDB) we were originally going to use DerbyJS, but I talked the team into trying Sente instead: https://github.com/ptaoussanis/sente https://github.com/ptaoussanis/sente We are not done, so the jury is still out, but I am very impressed, so far, with Sente. For dealing with MongoDB, we use Monger, a library that just keeps getting better and better: http://clojuremongodb.info/ http://clojuremongodb.info/ In terms of my personal development, I have struggled to find a workflow that allows me to be efficient at the REPL. I am just now starting to use Daniel Szmulewicz "system" which I am hopeful about: https://github.com/danielsz/system https://github.com/danielsz/system