What is DevOps and How Does It Work?

Table of Contents (TOC):

• Introduction
• Key Takeaways
• What Is DevOps and the Purpose of it
• How DevOps Works in Practice
• Roles and Responsibilities of a DevOps Engineer
• Benefits of DevOps for Teams and Businesses
• How to Get Into DevOps
• Conclusion
• FAQs

Introduction 

DevOps Engineer" is one of the most in-demand tech roles right now. Companies are hiring. Job boards are flooded with listings.

But if you read the requirements, it's confusing. Some want coding skills. Others want server management. Some expect you to know Docker, Kubernetes, AWS, CI/CD pipelines, and a dozen other tools you may not have encountered yet.

So, what is DevOps, and what does a DevOps engineer actually do? Is it a developer who also manages servers? A system admin who writes code? Something else entirely?

Key Takeaways:

• DevOps allows teams to release software multiple times a day with fewer errors.
   
• Automated pipelines and monitoring catch problems early and reduce downtime.
   
• A junior DevOps engineer typically maintains CI/CD pipelines, manages environments, and supports deployments.
   
• DevOps roles require skills that support software delivery, including automation, system management, and monitoring, which can be developed progressively.

What Is DevOps and the Purpose of It

DevOps is a way teams build, release, and run software together. It is not a tool, a team, or a job title.

Traditionally, development teams wrote code and delivered features, while operations teams ran that code in production. Once developers "handed over" the software, their responsibility ended. This separation worked when software changed slowly and releases happened quarterly or yearly.

DevOps reduces the distance between writing code and running it in real systems. Instead of treating development and operations as isolated functions, DevOps encourages shared responsibility across the entire application lifecycle, from the first line of code to how it performs for users in production.

The purpose: deliver software faster, more reliably, and with less friction. 

How DevOps Works in Practice

DevOps works through automation and continuous integration between code and infrastructure. These practices together form a practical DevOps framework that connects development, infrastructure, and operations.

• The Automated Workflow: When a developer pushes code to Git, CI/CD pipelines automatically run tests, build Docker containers, and deploy to production, zero manual steps.
   
• Infrastructure as Code: Engineers write configuration files (Terraform, Ansible) that automatically provision servers, networks, and resources in AWS, Azure, or GCP.
   
• Container Orchestration: Kubernetes manages applications across servers, automatically handling scaling and failures.
   
• Monitoring and Response: Prometheus collects metrics, logs capture behavior, Grafana visualizes health. When alerts fire, engineers check logs and either roll back or push fixes.
   
• Version Control: Everything from the code, and infrastructure, to scripts, all go through Git with peer review.

DevOps makes infrastructure and deployments programmable, repeatable, and testable instead of manual and error-prone.

Roles and Responsibilities of a DevOps Engineer

A DevOps engineer is responsible for operating the software delivery pipeline. The job is execution-heavy, system-focused, and measurable.

In practice, the work falls into these areas.

1. Build and release pipeline ownership

• Configure CI/CD pipelines that trigger on code changes
• Ensure builds fail early when tests or checks break

2. Environment and infrastructure management

• Provision and manage cloud resources (compute, storage, networking)
• Maintain multiple environments (dev, staging, production)

3. Deployment execution and rollback handling

• Automate deployments using predefined workflows
• Implement rollback mechanisms for failed releases

4. System monitoring and failure detection

• Set up monitoring for uptime, resource usage, and errors
• Investigate logs and metrics during incidents

5. Tooling and platform maintenance

• Maintain CI/CD tools, cloud services, and monitoring systems
• Upgrade or reconfigure tools when reliability or scale requires it

A junior DevOps engineer is expected to run and maintain existing systems, follow established deployment processes, and build reliability through careful execution before taking architectural responsibility.

Also Read: Why DataOps is the Future of Data Engineering and Analytics

Benefits of DevOps for Teams and Businesses

DevOps delivers value by making software changes frequent, predictable, and recoverable instead of slow, risky, and fragile.

• Releases happen faster because build, test, and deployment steps are automated and repeatable.
   
• Deployment failures reduce because changes are smaller and validated before reaching production.
   
• Recovery time improves because monitoring and rollback mechanisms are built into the delivery process.
   
• Operational effort drops because infrastructure and environments are managed through code, not manual setup.
   
• Team friction decreases because development and operations share ownership of delivery and stability.
   
• Downtime costs reduce because incidents are detected earlier and resolved faster.

Also Read: Cloud Computing Explained: How the Internet Runs Almost Everything

How to Get Into DevOps

DevOps positions often come with 2-5 years of experience in software development, system administration, or cloud operations. The common path is starting as a developer, system administrator, or cloud engineer, then transitioning after gaining foundational skills.

Essential Skills to Build:

• Linux Fundamentals: Master command-line operations, file systems, and process management. Most DevOps infrastructure runs on Linux.
   
• Programming: Python and Bash are critical for automation. Learn to write scripts that automate deployments, manage infrastructure, and handle repetitive tasks. UniAthena's Basics of Python course covers programming fundamentals needed for DevOps automation.
   
• Cloud Platforms: Learn AWS, Azure, or GCP. Start with AWS: launch instances, configure networks, manage storage. Pursue certifications like AWS Cloud Practitioner.
   
• Containers and Orchestration: Master Docker for packaging applications, then Kubernetes for managing containers at scale.
   
• CI/CD Pipelines: Build automated testing and deployment workflows using Jenkins, GitHub Actions, or GitLab CI.
   
• Infrastructure as Code: Learn Terraform or Ansible to define infrastructure programmatically.

Timeline: Expect 10-15 months from zero to job-ready. Build projects demonstrating CI/CD pipelines, infrastructure automation, and monitoring. Host everything on GitHub with clear documentation.

Also Read: Cloud-Native AI: Building ML Models with Kubernetes and Microservices

Conclusion 

A career in DevOps requires skills across programming, automation, cloud systems, databases, and analytics.

UniAthena offers courses that build these skills, including 

• Python,
• SQL,
• Data Analytics,
• IT Systems, and
• Business-Technology programs. 

These courses give you the foundation needed to take on real DevOps responsibilities.

FAQs 

Q1. What is DevOps?

A: DevOps is a set of practices that connects software development and IT operations to deliver applications faster and more reliably.

Q2. Is DevOps a job role?

A: No. DevOps is a workflow, but companies hire DevOps engineers to maintain pipelines, automation, and system reliability.

Q3. What skills do I need for DevOps?

A: Programming, Linux/Windows systems, cloud platforms, databases, automation, CI/CD pipelines, and monitoring/analytics.

Q4. Can I start DevOps as a beginner?

A: Yes. Start by learning programming, system fundamentals, databases, and automation, then practice with pipelines and cloud tools.

Q5. What does a junior DevOps engineer do?

A: They maintain pipelines, manage environments, support deployments, monitor systems, and handle incidents under supervision.