Principal Software Engineer

Location: Sydney CBD Area, Melbourne, VIC - 357 Collins Street

Time Type: Full time

Job Description

Principal Software Engineer – Personalisation & Digital Experience

• Drive the design and build of a next-generation personalisation engine powering millions of customer interactions
• Lead architecture across backend systems, intelligent signals and customer experience platforms
• Partner with senior engineering and product leaders to shape the future of hyper-personalised banking

Do work that matters

We’re transforming the digital banking experience for millions of Australians.

The Getting Connected value stream sits at the heart of our digital group, responsible for onboarding customers, helping them navigate the digital ecosystem, and delivering personalised, relevant experiences from the moment they arrive on the home screen.

We are evolving from cohort-based personalisation to true user-level hyper‑personalisation, powered by intelligent signals and a modern technology stack. This includes building a new personalisation engine that can surface timely, contextual prompts — like bill reminders and tailored insights — to help customers make better financial decisions.

As a Principal Engineer, you’ll play a critical role in shaping this transformation, delivering innovative, scalable platforms that define how customers experience our digital channels such as the CommBank App and Netbank.

See yourself in our team

You’ll be part of the Getting Connected value stream within our retail digital group — a large, high-impact ecosystem made up of multiple squads focused on delivering seamless, personalised customer experiences.

Working primarily within the Home Screen squad, you’ll lead engineering across key personalisation capabilities, supporting two squads directly while collaborating with others across the value stream.

This team is focused on:

• Onboarding customers into the digital environment
• Curating personalised customer journeys and dashboards
• Building intelligent signals that proactively engage customers
• Enabling real-time, data-driven personalisation at scale

You’ll collaborate with engineers, product owners, and senior technology leaders to design and deliver the systems that power one of the most visible and critical parts of our digital experience.

What you’ll do

• Provide technical leadership and architectural direction for the personalisation engine and associated backend systems
• Design and build scalable platforms powering intelligent signals and real-time personalisation
• Lead the transition from segment-based to individual-based personalisation models
• Work hands-on across backend systems, APIs, and data integrations in a high-scale environment
• Partner with multiple squads to ensure alignment across architecture, performance, and delivery
• Influence and uplift engineering standards, including testing, observability, and deployment practices
• Drive innovation by exploring new technologies and approaches beyond the current ecosystem
• Mentor engineers and elevate technical capability across the team

What we’re looking for

We’re interested in hearing from people who:

• Bring deep backend engineering expertise with strong architectural experience
• Have delivered large-scale, customer-facing platforms in complex environments
• Are experienced in distributed systems, APIs, and event-driven architecture
• Can navigate ambiguity and drive solutions in greenfield or evolving environments
• Demonstrate strong learning agility, curiosity, and innovation mindset
• Have the confidence to challenge thinking and influence senior stakeholders
• Thrive in cross-functional teams and can balance hands-on work with strategic leadership

Experience with personalisation, recommendation systems, or customer experience platforms is highly valued, but not essential.

Skills & technologies

We use a broad range of technologies, and you don’t need experience across all of them. Exposure to the following will be beneficial:

• Backend: .NET / C#, Node.js or similar
• Architecture: Microservices, event-driven systems
• Data: Real-time data processing, APIs, distributed systems
• Personalisation: Customer behavioural data, signals, decisioning engines
• DevOps: CI/CD, automation, modern deployment practices
• Cloud & Infrastructure as Code tools

If this sounds like you, apply today!

Working with us

At CBA, we're building a diverse, inclusive, and flexible workplace where engineers can do meaningful work at scale. We live our values of Care, Courage, and Commitment, and we invest in developing engineering leaders who raise the bar for the whole organisation.

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