Principal Software Engineer - Full Stack (Java)

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transforming our ATM network with secure, resilient, cloud-native engineering at scale. •

deep Java, Spring Boot, AWS and full-stack expertise with Principal-level leadership. •

will shape architecture, modernise legacy systems and accelerate AI-powered engineering.

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and help reshape the technology powering one of the most critical parts of the customer experience: our ATM network. You'll take a leading role in a major three-year transformation spanning ATM software, routing and switching, reconciliation, real-time data and cash-management capabilities, including a greenfield ATM switching platform and the move towards a cloud-native architecture. This is deep engineering work at scale, to create platforms that are secure, maintainable and built for production from day one. You'll have the opportunity to define the target architecture rather than simply reproduce the past, applying strong engineering judgement to determine what should be modernised, simplified or completely reimagined. As a Principal Engineer, you'll bring technical leadership to some of the domain's hardest problems, from designing resilient cloud infrastructure and integrating a new Java-based ATM switch to unravelling complex legacy estates. You'll champion

, while helping teams build clear ownership across interconnected systems. AI is also becoming part of the engineering toolkit, creating opportunities to use

to accelerate reverse engineering, uncover requirements, prototype solutions and improve the developer experience. More than delivering individual components, you'll influence engineering direction across the domain, mentor other engineers and turn a highly interconnected technology landscape into simpler, safer and more adaptable services for customers.

, working within Assisted Technology to reimagine how our branch colleagues support customers. We're bringing together engineering, customer journeys and colleague experiences to move beyond disconnected technology and create simpler, more connected ways to serve customers. Our team is building capabilities including intelligent concierge experiences, agentic appointment booking, customer-intent capture, skills matching and smarter branch operations, all with the ambition of helping colleagues serve customers faster and reducing the time customers spend waiting. We're a team that enjoys solving complex problems together and shaping solutions where the answers aren't always obvious. With significant greenfield engineering ahead of us, you'll work across

, while helping influence our architecture, engineering practices and technical direction. You'll have the space to challenge ideas, share your expertise and help us build experiences that make a meaningful difference for both our customers and the colleagues who serve them.

, accelerating discovery, codebase understanding, requirements, development, testing, modernisation and delivery. •

, mentoring engineers, influencing architecture across teams, constructively challenging decisions and continually raising engineering standards.

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

React, Next.js, TypeScript •

Java, Spring Boot, Spring Framework, microservices, RESTful APIs, Web APIs •

Enterprise system design, scalable architecture patterns, distributed systems •

Apache Kafka, event streaming, asynchronous architectures, real-time data processing •

Oracle PL/SQL, MongoDB, AWS NoSQL services, high-availability and performance-optimised data layers •

AWS, cloud-native services, scalable and secure cloud infrastructure •

AWS CDK, Terraform, AWS CloudFormation •

GitHub Actions, CI/CD pipelines, security automation, continuous delivery •

Unit testing, component testing, integration testing, end-to-end testing, Specmatic API contract testing •

GitHub, advanced Git workflows, branching strategies, monorepo architecture, TurboRepo •

Generative AI, agentic software development, Roo Code, Cline, Claude Code, GitHub Copilot •

Observe, Prometheus, Grafana, PagerDuty, monitoring, alerting, operational reliability 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. We're aware of some accessibility issues on this site, particularly for screen reader users. We want to make finding your dream job as easy as possible, so if you require additional support please contact HR Direct on 1800 989 696. Advertising End Date: 22/11/2026