Staff Software Engineer - Web Application (Full Stack)

CommBank; Sydney; On-site; AUD 180,000 - 240,000; Full time

Job summary

CommBank is seeking a Staff Software Engineer for the Web Application (Full Stack) to help drive an engineering transformation across web and backend systems. You will work within the CommSec Practice on a high-visibility platform, shaping product design and delivering robust APIs at scale.

You will mentor engineers, champion best practices, and influence technical strategy across teams while ensuring security, reliability and performance in a modern cloud environment.

Qualifications

• Experience designing and delivering web and backend systems.
• Ability to own end-to-end system design and architecture.
• Strong focus on reliability, observability, and security.

Responsibilities

• Champion best practices in web and backend development, including architecture, testing, CI/CD, and performance optimisation.
• Collaborate with cross-functional teams to deliver high-impact features and improvements to the CommSec platform.
• Drive technical strategy and architectural decisions across Web and backend systems, ensuring scalability, maintainability and security.
• Promote a culture of innovation, inclusion and psychological safety within the team.
• Partner with stakeholders across product, design and operations to align on goals and deliver exceptional customer outcomes.

Skills

System design

Architecture

Ownership

Reliability

Tools

TypeScript

React

C#/.NET Core

Java

MSSQL

Docker

Kubernetes

CI/CD

Job description

Staff Software Engineer - Web Application (Full Stack)

CommBank is driving a major engineering transformation, aiming to redefine customer expectations and build tomorrow’s bank with innovative technologies and products. Recognised for its industry-leading IT platforms, agile infrastructure, and pioneering services—from payments to mobile apps—CommBank’s Software Engineering team powers Australia’s number one banking app and other cutting-edge solutions.

The team excels in both web and mobile development, delivering robust APIs at scale, and is seeking creative, diverse engineers to join their journey, shape the future of banking, and support Australia’s economic growth through technology-driven customer experiences.

See yourself in ourteam:

As part of the Group’s Digital and Customer Crew within the CommSec Practice, the Staff Software Engineer will play a pivotal role in Australia’s largest online retail stockbroker, CommSec. This high-visibility platform supports a diverse investor base and employs a range of technologies. The role involves working with a high-performing, multi-level team of software engineers, consulting on product and feature design, and providing support to deliver key products and solutions. Engineers at CommSec gain exposure to top-tier IT systems and are encouraged to grow their careers across multiple areas within the broader CBA network.

We're interested in hearing from people who:

• Champion best practices in web and backend development, including architecture, testing, CI/CD, and performance optimisation.
• Collaborate with cross-functional teams to deliver high-impact features and improvements to the CommSec platform.
• Drive technical strategy and architectural decisions across Web and backend systems, ensuring scalability, maintainability, and security.
• Promote a culture of innovation, inclusion, and psychological safety within the team.
• Partner with stakeholders across product, design, and operations to align on goals and deliver exceptional customer outcomes.
• Frontend: TypeScript and React (building scalable applications)
• Backend: C# / .NET Core (designing and running APIs) or Java (willing to learn and work on .Net )
• Databases: Microsoft SQL Server (MSSQL) or similar SQL/NoSQL databases

Nice to have:

• Cloud platforms (AWS preferred; Azure or GCP also relevant)
• CI/CD, Docker, Kubernetes, and production operations
• Testing (unit, integration, E2E)
• Monitoring, alerting, and performance optimisation

What we value:

• Strong system design and architecture skills
• Ownership of systems end-to-end
• Focus on reliability, observability, and security

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