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.
A site reliability engineer (SRE) applies software engineering to operations, keeping production systems available, fast and recoverable. Organisations hire SREs when outages, slow responses or on-call fatigue start hurting customers and teams.
Site Reliability Engineering (SRE) is an approach to running production systems that applies software engineering to operations. It sets measurable reliability targets and replaces repetitive manual work with automation.
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.
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.
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