Senior Software Engineer

• Shape the future of AI-enabled fraud and scam detection

• Build cloud-native solutions that protect millions of customers

• Join a high-performing engineering team solving complex security challenges

Group Security brings together security, resilience, cyber and fraud capabilities with a shared purpose of safeguarding a brighter future for all.

You'll be part of the Fraud Technology Crew, contributing to the Group's fraud detection and prevention capabilities. Our teams design, build, deploy and operate:

• Custom in-house web applications hosted on AWS

• AI and data-driven fraud detection platforms

• Integrations with enterprise and SaaS platforms

• High-volume, real-time customer services

You'll join a collaborative, inclusive and high-performing engineering team delivering solutions that protect millions of customers every day.

Based in Sydney or Melbourne, you'll work alongside talented engineers, data specialists and fraud experts committed to staying one step ahead of evolving threats and delivering better outcomes for our customers.

As a Senior Software Engineer (Full Stack), you'll play a key role in helping protect our customers from fraud and scams. Working in the Fraud & Scam Chapter within Fraud Technology, you'll design, build and enhance applications and platforms that help address emerging threats.

You'll contribute to technologies that support scam detection, digital intrusion alerts and fraud prevention. This is an opportunity to solve complex engineering challenges, influence technical direction and deliver solutions that make a genuine difference to customer security.

We're looking for experienced Full Stack Engineers to modernise our fraud technology platforms and deliver secure, scalable solutions.

This is an opportunity to:

• Influence engineering excellence across Fraud Technology

• Build modern cloud-native applications

• Deliver secure and resilient customer experiences

• Help shape the future of AI-enabled fraud detection

You'll bring:

• Strong experience with PostgreSQL, Snowflake, SQL, scalable backend services, RESTful APIs, event-driven architectures, and Snowflake data pipeline development and integration

• Strong hands-on development experience with JavaScript/TypeScript, React, Node.js and Python

• Experience building scalable backend services and APIs

• AWS cloud experience

• Docker and containerised application development

• SQL experience including PostgreSQL and Snowflake

• Experience with GitHub and CI/CD tooling including GitHub Actions and TeamCity

• Strong understanding of data engineering concepts

• Database performance optimisation

• Python for automation and data processing

• Shell scripting (Bash)

• Experience building applications that minimise I/O and maximise performance

You'll also have:

• A security-first engineering mindset

• Experience with automated testing practices

• API and integration testing experience

• Exposure to DevSecOps practices

• Experience with observability tools such as Splunk or Observe

• Production monitoring and operational support experience

We're looking for engineers who:

• Take end-to-end ownership of the solutions they build

• Embrace AI coding assistants such as GitHub Copilot and similar developer productivity tools

• Enjoy mentoring and uplifting other engineers

• Thrive in Agile delivery environments

• Have a passion for continuous improvement and engineering excellence

At CommBank, we're committed to creating an accessible, inclusive and respectful workplace. If you require support or adjustments, please let us know. We welcome applications from people of all backgrounds and we're particularly committed to making a positive difference for Aboriginal and/or Torres Strait Islander Peoples. For support please contact 1800 989 696.