Tinfoil Security! All of our release engineering is orchestrated through a small Phoenix app that calls out to docker images to perform various types of deployments (Heroku, EC2, ECS, building docker images, etc).

I'll probably do a write-up on it at some point, because it is now trivial for anyone on the team to deploy any of our services to any environment (or a new one!), and to integrate new services into the platform.