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.
CI/CD is the practice of building and testing every code change automatically, then releasing changes that pass through a repeatable pipeline. It shortens the gap between writing code and running it in production.
DevOps is a way of building and running software in which development and operations work as one team. Automation, shared ownership and fast feedback let that team ship changes often and safely.
DevOps is a broad way of working that joins development and operations; SRE is one concrete way to run production, using SLOs and error budgets. Many teams use both, with SRE practices sitting inside a wider DevOps culture.
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.
A cloud engineer builds, configures and runs an organisation's infrastructure on cloud platforms such as AWS, Azure or Google Cloud. They keep environments working, secure and cost-controlled, so teams usually hire one as their cloud estate grows.
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.
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