DevOps engineers should be familiar with popular DevOps tools and frameworks, such as version control, configuration management, performance monitoring, and server monitoring tools.
DevOps engineers should be fluent in several languages, ranging from Python, Ruby, Golang, Java, JavaScript, Perl, PHP, Bash, and others, instead of just specializing in one.
A solid understanding of cloud computing is essential since the DevOps methodology relies on the cloud platform for testing, deploying, and releasing new code.