Configuration management is the practice of defining and enforcing the settings and software on servers through automated, version-controlled tooling. It keeps environments consistent instead of hand-configured.
A DevOps engineer builds and maintains the pipelines, infrastructure and automation that let software teams ship to production quickly and safely. Companies usually hire one when releases have become slow, manual or risky.
Immutable infrastructure is an approach where servers and containers are never changed after deployment. Any update is made by building a new image and replacing the old instances entirely.
Infrastructure as Code (IaC) is the practice of describing servers, networks and cloud services in version-controlled files. Environments are then created and changed by running that code rather than by clicking through a console.
Security patch management is the ongoing process of finding, testing and applying updates that fix known flaws. It covers operating systems, libraries, applications and infrastructure.
Helm is a package manager for Kubernetes that bundles the manifests an application needs into reusable, versioned charts. Teams can then install, upgrade and roll back that application with one command.
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