What Does a DevOps Engineer Do? Tasks & Skills

A DevOps engineer helps a team deliver and run software reliably. The work commonly includes automating tests and releases, managing infrastructure, improving monitoring, investigating failures and helping developers make changes safely. The exact responsibilities depend on the organisation; security and reliability are shared work, not one person’s job alone.

DevOps also describes a way of working. AWS’s overview connects culture, collaboration and automation across the software lifecycle. A job called “DevOps engineer” is one way a company assigns that work, not a standard job description used everywhere.

What DevOps engineers do: tasks and outputs

Not every role uses Kubernetes or owns every item in this table. Read the responsibilities and team structure in a vacancy instead of treating a list of tools as the definition of the job.

Follow one change from code to recovery

Here is an example: a team maintains a small booking service, and a developer changes the confirmation page to show the booking reference. Follow that change from code review to deployment.

Before the change is merged

A pull request runs the existing tests. A DevOps engineer may help the team make those checks reliable, keep dependencies and permissions under control, and ensure failures are easy to understand. The developer still owns the application change and its behaviour.

The team reviews what the checks cover. A green pipeline only proves that the checks passed; it does not prove that every customer journey works. Our CI/CD beginner tutorial shows a small version of this process.

When the team prepares the release

The pipeline builds an identifiable application image. Configuration and credentials are handled separately from the source code. The engineer checks how the target environment receives the new version, whether the service has appropriate health checks and how the previous version can be recovered.

This might use Docker, a managed application platform or Kubernetes. The choice depends on the workload and team. Docker packages applications; Kubernetes manages containerised workloads. They do different jobs, as our Docker and Kubernetes comparison explains.

When something goes wrong

Suppose the new deployment fails because a required configuration value is missing. The first task is to understand impact: is the old version still serving, are requests failing, and which users are affected? Then inspect deployment events, application logs and the configuration change.

Recovery follows the team’s procedure. That may mean restoring the previous application version or correcting configuration. Some changes, particularly database migrations, need a more careful recovery plan than simply selecting an older image. Check the actual application response after recovery.

After service is restored

Record what happened, what evidence identified the problem and which check could have caught it earlier. The useful outcome is a specific improvement: configuration validation, a clearer runbook, a safer release step or a test covering the missed behaviour.

This is why communication matters. An investigation should make the next change safer and easier for the whole team, rather than remain in one person’s memory.

What a working day can look like

There is no fixed daily timetable. Some days involve planned work; an incident can change the order. A representative mix might include:

• Reviewing an infrastructure pull request and its proposed resource changes.
• Investigating a slow or unreliable pipeline with a developer.
• Improving a script, deployment workflow or operational document.
• Checking an alert and deciding whether it needs action.
• Planning capacity, access or recovery with other engineers.
• Sharing an incident handover if the role includes on-call work.

On-call arrangements vary. Ask about the rota, service coverage, escalation support and how incidents are followed up. Do not assume every DevOps role requires overnight support, or that every incident is infrastructure-related.

Which tools do DevOps engineers use?

Think in categories before brands. The categories describe the work; the tools are ways to do it.

A beginner should learn a manageable set and connect it through one application. The DevOps tools guide explains the sequence. For a first implementation, GitHub documents workflows as events, jobs and steps, while the Kubernetes overview explains its role in managing containerised workloads.

Do DevOps engineers write code?

Yes, but the balance varies. Work can include automation scripts, tests, workflow definitions, infrastructure configuration and changes to application or platform code. YAML and Terraform configuration alone are not a replacement for understanding basic programming and error handling.

You do not need to build a large application before starting. Try a small script that reads a file, checks a condition and returns a useful failure. Our DevOps coding guide includes that kind of exercise.

DevOps, software, cloud, platform and SRE roles

These titles overlap. A software engineer may maintain deployment workflows; an SRE may write application code; a cloud engineer may build platforms. Compare the main responsibility, not just the title.

For more detail, compare DevOps with software engineering and platform engineering with DevOps. None of these labels automatically establishes seniority.

What changes between junior and senior work?

A junior engineer might make scoped changes with review, follow a runbook, improve a small script and investigate familiar failures with support. More experienced engineers may plan migrations, design shared delivery systems, evaluate risk and help multiple teams improve their operating practices.

Ask how changes are reviewed and who supports a new starter. A vacancy described as junior but requiring independent ownership of several critical services deserves a careful conversation about expectations.

Production work also involves constraints that a personal lab may not have: customer impact, data handling, access approvals, recovery requirements and team coordination. A portfolio can demonstrate understanding without pretending those constraints were present.

How to try the work before choosing a course

Take one small service through three exercises: make it reproducible, automate its checks, then investigate a failed release in a disposable lab. Keep the setup steps and your observations in a repository.

Use our DevOps project briefs and portfolio checklist. For each exercise, explain the symptom, the evidence you checked, the decision you made and what you would improve next.

If you enjoy this work, follow the DevOps learning roadmap. If you want live instruction, compare the CloudPros curriculum, student reviews and other learning formats using the CloudPros course guide.

Research the role in your own market

Course access and hiring requirements are different questions. Compare current vacancies where you want to work, including education, experience, location and on-call requirements. Use our country guidance for the USA, UK, Canada, Australia, Ireland and Nigeria.

Explore salaries for your location and experience level. Our UK salary guide includes advertised pay figures and a way to compare roles.

Frequently asked questions

What does a DevOps engineer do on a daily basis?+

The work can include reviewing infrastructure changes, improving CI/CD pipelines, automating checks, investigating alerts and supporting software releases. The balance depends on the team, service and on-call arrangements.

Do DevOps engineers write code?+

Yes. Work may include automation scripts, tests, infrastructure configuration, workflow definitions and application or platform code. The balance depends on the role; understanding programming and error handling is useful even when much of the work is configuration.

Do all DevOps engineers use Kubernetes?+

No. Kubernetes is one way to manage containerised workloads. A role may use virtual machines, managed application platforms or other container services. Learn the operating principles and match tools to the workload.

Is DevOps the same as software engineering?+

The roles overlap. Software engineering often emphasises application behaviour, while a DevOps role often emphasises delivery automation and operations. Responsibilities for deployment, security and reliability are shared differently by each team.