Do work that matters

As a Principal Software Engineer - Digital Customer Journey, you'll be at the forefront of transforming how Australian businesses access lending through digital-first, AI-enabled experiences. Working within Digital & Assisted Lending and reporting to the Crew Tech Lead, you'll provide technical leadership across some of the Bank’s most critical customer journeys, powering experiences across NetBank, the CommBank App, and self-service lending channels. You'll help shape the technology vision, architecture, and engineering standards that underpin a large-scale, multi-year Business Lending Modernisation Program, solving complex challenges that have a direct impact on how customers engage with our products and services.

This is an opportunity to influence the future of digital lending while building innovative, scalable solutions that deliver exceptional customer outcomes.

As a deeply hands-on technical leader, you'll set the benchmark for engineering excellence, guiding teams through complex technical decisions and championing modern software engineering practices. Your work will help create seamless, intelligent, and highly personalised customer journeys that make lending faster, simpler, and more intuitive for businesses across Australia.

Collaborating with talented engineers, product leaders, and technology specialists, you'll drive innovation at scale, mentor high-performing teams, and help define what great digital customer experiences look like. The solutions you build won't just improve systems, they'll shape the future of Business Banking and influence how millions of customers interact with one of Australia's leading digital banking platforms.

See yourself in our team: Join the Digital & Assisted Lending Crew within Business Banking Technology, where we're reimagining how Australian businesses access lending. Our team sits at the heart of a major multi-year Business Lending Modernisation Program, delivering digital-first, AI-enabled lending experiences across NetBank, Mobile Banking and self-service channels. We solve complex engineering challenges to create faster, smarter and more personalised customer journeys,



helping business customers access the funding they need with greater speed, transparency and confidence.

As part of this team, you'll help build scalable, cloud-native platforms that support millions of customer interactions every year. Working alongside talented engineers, architects, product specialists and business leaders, you'll shape the future of business lending through innovative technology, modern engineering practices and customer-centric design. The solutions we deliver have a direct impact on businesses across Australia, powering growth, supporting investment and helping communities thrive.

This is an prospect to work on meaningful technology at scale while contributing to one of the most significant digital transformations in Australian banking. We’re interested in hearing from people who: Bring proven Principal Engineer or Technical Leadership experience, owning end-to-end engineering outcomes across complex, customer-facing digital platforms at scale.

Remain deeply hands-on across architecture, design, coding, troubleshooting and production optimisation, with expertise in modern .NET Core and C# development.

Have solid full-stack capability across React, Next.js and API-driven ecosystems, delivering secure, accessible and high-performing customer experiences.

Demonstrate deep expertise designing cloud-native solutions on AWS, leveraging microservices, event-driven architecture, domain-driven design and distributed systems patterns.

Champion engineering excellence through DevSecOps, CI/CD automation, infrastructure as code, automated testing and modern software delivery practices.

Build and operate highly resilient, observable and scalable platforms using technologies such as OpenTelemetry, Prometheus, Grafana,



CloudWatch and related monitoring frameworks.

Have a track record of modernising platforms, reducing technical debt and simplifying complex customer journeys while improving delivery velocity and business outcomes.

Embrace AI-powered software engineering, applying tools such as GitHub Copilot, Codex, Cursor and AI-enabled SDLC practices to enhance developer productivity and quality.

Influence technical strategy across multiple teams, mentoring senior engineers and partnering with Product, Design and Business stakeholders to shape long-term technology direction.

Tech skills We don't expect you to know everything, but experience in several of the following will set you up for success:

Front End: Next.js, React, Customer Experience Engineering

Back End: .NET Core, C#, ASP.NET Core, Microservices Architecture, Event-Driven Services

APIs & Integration: GraphQL, REST APIs

Cloud: AWS Cloud-Native Services, AWS Lambda, S3, CloudFormation, Serverless Architecture

Architecture: Domain-Driven Design (DDD), Service-Oriented Architecture (SOA), Distributed Systems, Event-Driven Architecture

Containerisation: Kubernetes, Docker, Service Mesh

Infrastructure as Code (IaC): Terraform, AWS CloudFormation

DevOps: GitHub, GitHub Actions

Security: Secure SDLC, SonarQube, Snyk, OWASP Security Controls

Testing: TDD, unit, integration, API testing

Quality Tools: JMeter, Selenium, Postman

Observability: Prometheus, Grafana, ELK Stack, Datadog

AI Tooling/Practices: Claude Code, Codex, Cursor, Harness Engineering, Spec driven Development

Database such as Oracle, PostgresSQL , AWS Aurora

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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Advertising End Date: 10/09/2026

📌 Principal Software Engineer – Digital Customer Journeys (Sydney)
🏢 Commonwealth Bank
📍 Sydney