Principal Software Engineer

You are passionate about the full software lifecycle and delivering impactful solutions

We are high-performing engineers pushing the boundaries of modern software engineering. Together, we will build tomorrow's bank today—using world-leading technology, innovation, and emerging AI-powered capabilities to reimagine how customers experience banking.

Do work that matters

We're building tomorrow's bank today, which means we need creative and diverse engineers to help redefine what customers expect from a bank. From envisioning new technologies to reimagining digital products that shape Australia's future economy, you'll help design, build, and deliver solutions that make a tangible impact for millions of people.

Technology at CommBank powers everything we do—from our award-winning digital platforms to the systems that process transactions securely and at scale. We're building empowered, autonomous engineering teams that are product-led, outcome-focused, and responsible for end-to-end delivery. Here, you'll turn your passion for software design and architecture into reality. You'll work on cutting-edge systems using modern technologies to create seamless, resilient, and intelligent experiences for our customers and employees alike.

See yourself in our team

As a Principal Engineer, you'll lead a team of engineers to design and deliver impactful solutions across varied technology stacks. You'll influence product and delivery outcomes by partnering with Product Owners and Tech Leads, combining hands-on technical leadership with architectural vision and mentoring excellence. Aligned to product and customer outcomes, you'll own what you build through full-cycle engineering practices. You'll guide the engineering community, shape system design across domains, and drive innovation by leveraging modern engineering approaches and emerging technologies. You'll work closely with cross-functional teams and contribute to shaping engineering strategy across the organisation.

We're interested in hearing from people who:

• Lead with a customer-first mindset—designing solutions that align with user needs and business goals

• Bring hands-on experience in APIs, microservices, backend components, data layers, and AWS-native development

• Are knowledgeable in AI technologies and their role in future-proofing engineering solutions

• Demonstrate expertise across the full software development lifecycle using Agile and DevSecOps practices

• Apply modern engineering practices: CI/CD (GitHub Actions, Jenkins), automated testing, cloud pipelines, logging and monitoring

• Execute high-quality coding to solve business problems and minimise risk

• Communicate clearly and influence architectural and design decisions across teams

• Mentor and coach engineers, fostering a culture of excellence and collaboration

• Enforce tooling and standards—linting, formatting, type safety, and documentation

• Evaluate emerging technologies, set architectural direction, and shape engineering culture

Technical Skills

We use a wide range of technologies and don't expect you to know them all, but experience in some of the following will set you up for success:

• Frontend: React, TypeScript, , design systems (e.g. Figma-based, token-driven)

• Backend: Python, , Java, .NET Core, C#

• Databases: SQL, NoSQL (Postgres, MongoDB)

• Data Technologies: AWS-native tools (DynamoDB, Aurora, S3, Glue, Athena, Redshift)

• Architecture: Microservices, event-driven systems, distributed design

• Cloud: AWS (e.g. Certified Developer/Architect), Azure

• DevOps: GitHub Actions, Jenkins

• Containers: Docker, Kubernetes

• Security: Secure-by-design systems, threat modelling

• Testing: Unit, regression, contract testing, CI/CD automation

• Observability: Prometheus, Grafana, OpenTelemetry (if relevant)

AI & Emerging Technology

While this role isn't AI-first, we value engineers who:

• Understand how AI and machine learning can enhance software engineering workflows and productivity

• Have experience or interest in building AI-assisted engineering tools or AI-integrated applications (e.g., using LangChain, LlamaIndex, or GenAI APIs)

• Use AI-powered coding assistants like GitHub Copilot, Cursor, Continue, or Aider in day-to-day development

• Are curious about agentic systems and AI experimentation in real-world product environments

We welcome engineers who are excited to explore how AI can elevate engineering craft and customer experience.

Working with us

At CommBank, you'll thrive in a supportive environment that values innovation, inclusion, and growth. You'll be surrounded by talented, respectful colleagues who challenge and empower each other to deliver world-class experiences for our customers and communities.

We're looking for people who live our values of Care, Courage, and Commitment, and who want to make a real difference through technology. Whether you're passionate about system architecture, team leadership, or experimenting with new tools, this is your opportunity to shape the future of banking—today.

If you're already part of the Commonwealth Bank Group (including Bankwest, x15ventures), you'll need to apply through Sidekick to submit a valid application. We're keen to support you with the next step in your career.

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