Overview
Staff Software Engineer (Full Stack) — Business Banking Technology | Sydney or Melbourne
We are a deeply hands-on engineering team rebuilding Small Business Banking from the ground up. We're building tomorrow's business bank today and shaping a modern, personalised digital platform designed specifically for business customers — distinct from retail and corporate banking. This is a rare opportunity to shape a critical rebuild at scale, used by millions of customers.
As a Staff Software Engineer, you'll join a squad delivering the new Small Business Banking experience. You will play a key role in shaping architecture, raising engineering standards and mentoring other engineers. This is a senior, hands-on role. You will spend the majority of your time designing and building production systems, while influencing technical direction across the crew.
Responsibilities
* Design and develop scalable microservices and APIs
* Build modern front-end experiences (Next.js)
* Define and influence architecture for enterprise-scale applications
* Improve engineering standards, quality and secure coding practices
* Guide integration with internal and third-party services
* Contribute to safe deployments through CI/CD, automation and observability
* Mentor engineers and uplift technical capability within the squad
* Drive pragmatic, high-quality engineering decisions
What we're looking for
* Are genuinely hands-on and comfortable owning complex systems end-to-end
* Have strong backend engineering capability (REST APIs, microservices)
* Prefer full-stack capability (Next.js/React experience highly regarded)
* Have designed or contributed to enterprise-scale architecture
* Understand security, reliability and performance at scale
* Thrive in collaborative environments and challenge ideas constructively
* Care deeply about code quality, simplicity and long-term maintainability
* Actively mentor others and raise the engineering bar
Technical capability
We use a broad range of technologies. You don't need all of them — but strong engineering fundamentals are essential.
Our ecosystem includes:
Backend
* C# .NET Core, REST APIs, WebAPI
* Node.js, NestJS, ExpressJS, TypeScript
* Microservices and API integration
Frontend
* Next.js (preferred), React, Angular, TypeScript
Cloud & DevOps
* AWS and Azure
* Kubernetes, Docker
* CI/CD (GitHub Actions, TeamCity, Octopus, Azure DevOps)
* Infrastructure as Code (CloudFormation)
* Logging & observability (Splunk, monitoring tools)
Data
* MSSQL, Oracle, Snowflake
* NoSQL / DocumentDB
Experience with event-driven architecture (Kafka) is beneficial.
If you are a strong engineer from a different stack with proven depth, we're open — fundamentals matter more than exact tools.
If you're a lead engineer who still loves being deep in the code, shaping architecture and mentoring others — we'd love to hear from you.
Apply and work arrangement
Apply now.
We support our people with the flexibility to balance where work is done with at least half your time each month connecting in the office.
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: 27/03/2026
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