What is a DevOps Engineer at Commonwealth Bank of Australia?
As a DevOps Engineer at Commonwealth Bank of Australia (CBA), you are at the heart of the engineering engine that powers Australia’s leading financial institution. Your work directly impacts the reliability, security, and scalability of services used by millions of Australians every day, from the award-winning CommBank app to complex enterprise banking systems. You are not just maintaining infrastructure; you are an enabler for engineering velocity, ensuring that product teams can deploy code safely, rapidly, and consistently.
This role requires navigating the unique intersection of modern cloud-native technologies and rigorous financial compliance. You will be instrumental in bridging the gap between development and operations, designing robust CI/CD pipelines, and managing infrastructure as code at a massive scale. At CBA, DevOps is a culture as much as it is a technical discipline, meaning your ability to collaborate and drive engineering best practices is just as vital as your scripting skills.
Expect an environment that is fast-paced but highly structured. You will work with cutting-edge tools—heavy on AWS, Terraform, and Kubernetes—while solving complex problems related to automation and system resilience. If you are passionate about building scalable, secure environments and thrive in a high-impact, collaborative setting, this role offers a remarkable platform to elevate your career.
Common Interview Questions
See every interview question for this role
Sign up free to access the full question bank for this company and role.
Sign up freeAlready have an account? Sign inPractice questions from our question bank
Curated questions for Commonwealth Bank of Australia from real interviews. Click any question to practice and review the answer.
Design Terraform-based infrastructure as code for AWS data pipelines with reusable modules, secure state management, CI/CD, and drift control.
Design a dependency-aware ETL orchestration system that coordinates engineering, QA, and client handoffs for 1,200 daily feeds with strict 6 AM SLAs.
Design disaster recovery for batch+stream payment pipelines with strict RPO/RTO, idempotent reprocessing, and consistent Snowflake analytics.
Sign up to see all questions
Create a free account to access every interview question for this role.
Sign up freeAlready have an account? Sign inGetting Ready for Your Interviews
Preparing for the DevOps Engineer interviews at Commonwealth Bank of Australia requires a strategic approach. Your interviewers will look for a blend of hands-on technical expertise, architectural understanding, and a collaborative mindset.
Focus your preparation on the following key evaluation criteria:
- Cloud & Infrastructure Mastery – You must demonstrate a deep understanding of cloud services (primarily AWS) and Infrastructure as Code (IaC), with a strong emphasis on Terraform. Interviewers evaluate your ability to design secure, scalable, and reproducible environments.
- Automation & Pipeline Architecture – This assesses your command over version control (Git) and CI/CD principles. You will be expected to articulate not just how to build pipelines, but why specific workflows (like PR processes versus direct merging) are chosen.
- Scripting & Problem Solving – You are evaluated on your ability to automate away toil. Expect to showcase your proficiency in Python or Bash, and be prepared for potential algorithmic problem-solving or scripting challenges.
- Culture & Collaboration – CBA places a high premium on teamwork and communication. Interviewers will assess how you handle ambiguity, work alongside software engineers, and align with the bank's core values of care, courage, and commitment.
Interview Process Overview
The interview process for a DevOps Engineer at Commonwealth Bank of Australia is notably seamless, professional, and fast-paced. Candidates frequently report moving from the initial phone screen to final rounds—and sometimes even receiving an offer—within a single week. The company values efficiency and clear communication, meaning you should be prepared to interview quickly once the process begins.
Typically, the journey starts with a brief 15-minute phone screen with a Recruiter or Hiring Manager. From there, the process branches slightly depending on the specific team. You may be given a multi-part technical challenge covering algorithms, scripting, and Kubernetes, or you may move directly into a comprehensive 60-minute technical interview with a Hiring Manager and a Senior Engineer. The final stage is a dedicated culture and behavioral interview designed to ensure you align with CBA’s collaborative environment.
This visual timeline outlines the typical stages you will encounter, from the initial screening to the final behavioral rounds. Use this to anticipate the rapid pace of the CBA process; knowing that technical deep-dives and cultural assessments happen in quick succession will help you manage your preparation time and energy effectively.
Deep Dive into Evaluation Areas
To succeed in the CBA technical rounds, you need to go beyond surface-level definitions. Interviewers want to see practical experience and an understanding of trade-offs.
Infrastructure as Code and Cloud Platforms
CBA relies heavily on automated, scalable infrastructure to support its massive user base. You will be evaluated on your ability to provision and manage cloud resources securely and efficiently. Strong candidates do not just know how to write code; they know how to structure it for enterprise scale.
Be ready to go over:
- AWS Services – Core compute, networking, and security services (EC2, VPC, IAM, S3, EKS).
- Terraform – State management, modules, and handling infrastructure drift.
- Security & Compliance – Implementing least privilege access and securing cloud perimeters, which is critical in banking.
- Advanced concepts (less common) – Multi-region disaster recovery, custom Terraform providers, and advanced AWS networking (Transit Gateways).
Example questions or scenarios:
- "Walk me through how you would structure Terraform modules for a multi-environment AWS deployment."
- "How do you securely manage Terraform state files in a team environment?"
- "Explain how you would troubleshoot a sudden spike in latency between two AWS services."
CI/CD and Version Control Workflows
Your ability to streamline the software delivery lifecycle is a core component of this role. Interviewers will heavily test your conceptual understanding of deployment strategies and Git workflows.
Be ready to go over:
- Pipeline Architecture – The fundamental reasons why CI/CD pipelines are used and how they reduce deployment risk.
- Git Workflows – Branching strategies, Pull Request (PR) processes, and conflict resolution.
- Deployment Strategies – Blue-green, canary, and rolling deployments.
- Advanced concepts (less common) – GitOps methodologies (e.g., ArgoCD) and pipeline security scanning (DevSecOps).
Example questions or scenarios:
- "Tell me why a CI/CD pipeline is used in a modern engineering environment."
- "Is it better to merge directly to main and fix issues as they arise, or to use a strict PR process? Justify your answer."
- "How would you design a pipeline to ensure no secrets are accidentally committed to the repository?"
