Automated archiving and versioning of builds.
Automated running of automated test scenarios (i.e. the automated tests created by the test analysts).
Deployment of configurations.
Deployment of applications.
Automated promotion of applications and configurations between environments.
Automated rollbacks of previously promoted applications and configurations.
Automated developer environment setup.
Operating systems: Linux (*nix) administration
Build tools: Maven, Grunt, Gulp, Gradle
Continuous integration tools: Jenkins, Go CD
Source control tools / techniques: Subversion, Git, Semantic versioning
Artifact management tools: Nexus, Artifactory, Sinopia
In-house tools: WDR (which is a Python/Jython lib)
Servers: Node.js, nginx, IBM WebSphere