Staff Software Engineer

Commonwealth Bank; City of Melbourne; On-site; AUD 210,000 - 260,000; Full time

Job summary

Commonwealth Bank is seeking a Staff Software Engineer to join the Payments & Acceptance domain in Sydney. You will help design and build scalable, cloud-native payment platforms, leading architectural decisions and influencing engineering direction across squads.

You will mentor engineers, champion automated testing, and contribute across backend services, APIs and cloud infrastructure to deliver reliable customer experiences at scale.

Qualifications

• Proven experience designing and delivering complex, distributed systems at scale.
• Strong capability in building microservices in cloud-native environments.
• Track record mentoring engineers and influencing technical decisions.

Responsibilities

• Lead the design and delivery of scalable, resilient and secure software solutions across our eCommerce payments platform.
• Build and evolve Java-based microservices supporting merchant onboarding, payment processing and settlement.
• Contribute across the stack from backend services to cloud infrastructure and user experiences.
• Drive architectural decisions and influence engineering direction across squads.
• Champion CI/CD, automated testing, observability and DevSecOps practices.
• Partner with product, architecture and business stakeholders to deliver meaningful customer outcomes.
• Mentor engineers and uplift technical capability across the team.
• Support production systems and continually improve reliability and performance.

Skills

Distributed systems

Microservices

Cloud-native

Mentoring engineers

Architectural decisions

Stakeholder management

CI/CD

Observability

DevSecOps

Tools

Java

Spring Boot

RESTful APIs

Docker

Kubernetes

AWS

Terraform

CloudFormation

React

TypeScript

Node.js

Next.js

Job description

eCommerce Payments | Payments & Acceptance | Business Banking Technology | Sydney

Shape the future of digital commerce at scale

• Build modern cloud-native products powering payment experiences for Australian businesses


• Influence architecture, engineering standards and technical direction across a rapidly growing platform


• Join a major transformation replacing legacy payment technology with modern in-house solutions

Do work that matters

At CommBank, we're building the future of digital commerce for Australian businesses.

Following the acquisition of a leading payment service provider, we're investing heavily in the next generation of our eCommerce platform.

Our mission is to simplify how merchants onboard, accept payments, process transactions and receive settlements through modern, scalable technology built in-house.

See yourself in our team

As a Staff Software Engineer, you'll join one of our core engineering squads responsible for merchant onboarding or payment processing capabilities. You'll help design and build products that power the end-to-end eCommerce journey for some of Australia's largest businesses while influencing technical direction across a growing engineering organisation.

This is an opportunity to work on a platform that is actively being transformed, replacing legacy vendor solutions with modern cloud-native services and delivering new customer experiences at scale.

Business Banking Technology executes the technology strategy across Business Banking through the application of modern technology, resilient platforms and engineering excellence to deliver valuable customer outcomes at speed and scale.

You’ll join the Payments & Acceptance domain, a growing engineering organisation of more than 60 engineers responsible for critical eCommerce capabilities including:

• Merchant onboarding and activation


• Payment transaction processing


• Settlement and reconciliation services


• eCommerce platform services


• Customer-facing merchant experiences

With multiple strategic capabilities being launched throughout the year, you'll play a key role in shaping the architecture, engineering practices and customer outcomes of a platform that is still being built.

Grow. Belong. Shape What's Next.

What you'll do

• Lead the design and delivery of scalable, resilient and secure software solutions across our eCommerce payments platform


• Build and evolve Java-based microservices supporting merchant onboarding, payment processing and settlement capabilities


• Contribute across the technology stack, from backend services and APIs through to cloud infrastructure and customer experiences


• Drive architectural decisions and influence engineering direction across squads


• Champion engineering excellence through automated testing, CI/CD, observability and DevSecOps practices


• Partner with product, architecture and business stakeholders to deliver meaningful customer outcomes


• Mentor engineers and uplift technical capability across the team


• Support production systems and continuously improve reliability, performance and operational excellence

We're Interested In Hearing From People Who

Bring deep software engineering expertise and a passion for building scalable, customer-focused platforms. You'll be comfortable leading complex technical initiatives while remaining hands-on and close to delivery.

We're particularly interested in people who have:

• Proven experience designing and delivering complex distributed systems at scale


• Strong hands‑on software engineering capability and a passion for solving challenging technical problems


• Experience building microservices architectures within cloud‑native environments


• Strong architectural and systems design skills


• A track record of mentoring engineers and influencing technical decision‑making


• Excellent stakeholder management and communication skills


• The ability to balance strategic thinking with hands‑on engineering delivery


• A growth mindset and curiosity for emerging technologies and engineering practices

Technical Experience

Experience with some of the following technologies will help you succeed:

Backend Engineering

• Java


• Spring Boot


• RESTful APIs


• Microservices Architecture


• Event-Driven Systems


• Domain-Driven Design (DDD)

Cloud & Platform

• AWS


• Kubernetes


• Docker


• Terraform and/or CloudFormation

Engineering Excellence

• CI/CD Pipelines


• Automated Testing


• Observability and Monitoring


• DevSecOps Practices


• Agile Software Delivery

Front-End Technologies (Highly Regarded)

• React


• TypeScript


• Node.js


• Next.js

Emerging Technology

• Exposure to AI-powered development or operational tooling


• Interest in applying AI to engineering and security challenges


• Experience evaluating and adopting new technologies

Working with us

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.

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