You should be familiar with the following:
EC2, ECS, S3, SQS and other AWS services
A plus if you are familiar with Google Cloud and other providers: Azure, Rackspace, Heroku
Python, bash and/or Golang is a plus
Docker and specifically a container orchestration tool such as Kubernetes, Mesos, Swarm
CI/CD tools such as Jenkins, Travis CI, Circle CI, Bamboo
DevOps orchestration: Chef, Puppet, Ansible or Salt
Experience deploying micro services is a plus.