Principal Software Engineer

Principal Software Engineer – Customer Service Lending 

Do work that matters 
CommBank is recognised as an industry leader in IT and operations, with world-class platforms, agile infrastructure, and a commitment to innovation in everything from payments to internet banking and mobile apps. 

As part of Customer Service Lending, you'll contribute to all aspects of the technology products and services we deliver — from technical strategy and design to coding, deployment, and operations. 

See yourself in our team 

Our squad's purpose is to deliver cutting-edge digital tools and automations that empower lenders, associates, and relationship managers to grow CBA's proprietary lending businesses. We also develop cross-cutting capabilities that serve multiple business units, so we deliver with scale and reusability in mind. 

As a Principal Engineer, you'll act as a Tech Lead guiding a small team of 3-4 Engineers. You will provide core technology and domain expertise to inform technical strategy be responsible for the design of the solutions for complex challenges within a business unit. You'll have a strong risk mindset and take a security from the first line of code approach. Those around you to invest in their own engineering craft, as well as building class leading applications is something that you'll be passionate about. 

Key Responsibilities 

• Design, build, and maintain robust backend and full-stack applications. 

• Monitor and optimise system performance for high availability and reliability. 

• Mentor junior engineers and conduct thorough code reviews. 

• Stay up to date with emerging technologies to enhance system architecture. 

• Develop new features and continuously improve existing ones. 

• Promote a collaborative, knowledge-sharing engineering culture. 

We're interested in hearing from people who 

• Have a strong product mindset and use AI tools effectively in their work. 

• Have experience working collaboratively within cross-functional squads. 

• Possess strong communication skills and raise concerns or ideas promptly. 

• Take ownership of tasks, collaborate proactively, and mentor junior engineers. 

• Value teamwork and foster a culture of continuous learning. 

• Can handle differing opinions and work towards feasible solutions.

• Are open to new challenges, technologies, and tools. 

Technical Skills 

We use a broad range of tools, languages, and frameworks. We don't expect you to know them all — but experience or exposure to some of these (or equivalents) will set you up for success: 

• Experience building scalable, high-performance, and secure APIs. 

• Solid experience building backend applications using .NET or similar languages (Java or Go). 

• Hands-on experience developing and scaling full-stack applications using modern JavaScript/TypeScript frameworks such as React, , , and NestJS. 

• Experience building cloud-native applications on AWS. 

• Familiarity with full-cycle engineering, including test automation (unit, integration, and end-to-end tests). 

• Proficiency with relational databases (SQL) and NoSQL databases such as AWS DocumentDB. 

Working with us 

Whether you're passionate about customer service, driven by data, or inspired by creativity, a career with CommBank is for you. 

We support our people with the flexibility to balance where work is done — with at least half their time each month spent connecting in the office.

If this sounds like the role for you, we'd love to hear from you. Apply 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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