Simple deployment was another important factor in choosing Go for writing the microservices. After deciding to switch to a microservice architecture, they initially wanted to write all the services in Ruby. But their Rails app was hard to deploy, and by splitting one app into many services, they felt like they were simply multiplying their problems from a system administration perspective. Go deployments are very simple — simply build, rsync, and restart via upstart. This has worked well for all their microservices. Recently they switched to CodeDeploy, a new deployment service from Amazon. The CodeDeploy documentation was very sparse, but even so, setting up the deployment for the Go services took only a couple of hours. Contrast that with the Ruby application, which took 4 days with multiple failed attempts.