Staff Software Engineer / Lead Software Engineer

Commonwealth Bank of Australia; Sydney; On-site; AUD 180,000 - 240,000; Full time

Job summary

Commonwealth Bank of Australia (EC Technology) seeks a Staff Software Engineer to engineer platforms that detect and investigate financial crime. You will work hands-on across services, APIs, data integration and interfaces used by detection teams.

You will help modernise shared platforms, embed AI capabilities, and drive reliability and security across critical investigation workflows. You’ll influence design decisions and mentor peers while delivering production code.

Qualifications

• Strong computer science foundations and ability to work across technologies as problems evolve.
• Experience across backend services, APIs and data integration with modern tech stacks.
• Comfort designing and building services using a modern typed language (Java, Kotlin, Go or Python).
• Full-stack capability with React and TypeScript, or similar frontend/backend-for-frontend setup.
• Understanding of cloud-native delivery, containers, automated pipelines and production observability.
• Willingness to reuse proven capabilities and reduce duplication across platforms.
• Experience with security, privacy, reliability and regulatory controls in design delivery.
• Eagerness to learn new languages, frameworks and tools as needed.
• Collaborative mindset with mentoring and code-review experience.
• Exposure to AWS, Kubernetes, Docker, GitHub Actions, Argo CD, Kafka, Grafana or Prometheus is advantageous.
• Experience building or operating AI-enabled systems including model integration and guardrails.

Responsibilities

• Design, build and operate production services and APIs with clear contracts and boundaries.
• Contribute to architecture decisions including refactoring, modularisation and performance improvements.
• Consolidate capabilities onto shared platforms and retirement of legacy tech as core work.
• Build and maintain CI/CD pipelines, automated testing and progressive delivery practices.
• Establish reliability and observability via dashboards, alerts, SLAs and ownership.
• Engineer secure and dependable AI features, including orchestration and guardrails.
• Embed security, privacy, reliability and regulatory controls into design and delivery.
• Raise engineering standards through thoughtful code reviews and strong reasoning.
• Collaborate across teams, mentor others and share design decisions.
• Familiarity with AWS, Kubernetes, Docker, GitHub Actions, Argo CD, React, TypeScript, Kafka, Grafana/Prometheus is helpful.

Skills

Algorithms

Data structures

Concurrency

System design

Backend services

APIs

Data integration

Cloud-native

Security

Observability

AI systems

Tools

Java

Kotlin

Go

Python

React

TypeScript

AWS

Kubernetes

Docker

GitHub Actions

Argo CD

Kafka

Grafana

Prometheus

Job description

Staff Software Engineer

• Engineer production services, APIs, data integrations and interfaces that help detect and investigate financial crime.


• Work across the full product surface, solving complex problems while influencing design and uplifting engineering capability.


• Help modernise shared platforms and responsibly embed AI and agentic capabilities into critical investigation workflows.

Do work that matters

Join EC Technology and help engineer the platforms that detect and investigate financial crime across the bank. You'll work hands-on across services, APIs, data integration and the interfaces used by detection and investigation teams.

As a Staff Software Engineer, you'll be a key technical contributor who ships production code, shapes design decisions and helps other engineers grow. You'll help modernise our technology by reusing and standardising shared capabilities, reducing duplication and retiring legacy solutions where appropriate. You'll also help build reliable AI and agentic capabilities that augment human decisions while maintaining appropriate controls.

See yourself in our team

EC Technology builds the capabilities that support the detection and investigation of fraud and financial crime. The broader Group Security function brings together cyber security, fraud technology, fraud management, investigations and resilience to safeguard the bank and protect customers.

In this role, you will:

• Design, build and operate production services and APIs with clear contracts and integration boundaries.


• Contribute to architecture and design decisions, including refactoring, modularisation and performance improvements.


• Consolidate capabilities onto shared platforms and treat the retirement of legacy technology as core engineering work.


• Build and maintain continuous integration and delivery pipelines, automated testing and progressive delivery practices.


• Establish strong reliability and observability through dashboards, alerting, service-level objectives and operational ownership.


• Engineer secure and dependable AI and agentic features, including orchestration, evaluation and guardrails.


• Embed security, privacy, reliability and regulatory controls into design and delivery.


• Raise engineering standards through thoughtful code reviews, pairing and clear technical reasoning.

We're interested in hearing from people who:

You're a versatile software engineer with strong computer science foundations and the confidence to work across technologies as the problem changes. You combine hands-on delivery with sound technical judgement, take ownership of production outcomes and help create an environment where engineers can do their best work.

• Bring strong foundations in algorithms, data structures, concurrency and system design.


• Have experience across backend services, APIs and data integration, with openness to contributing to internal user interfaces when required.


• Can design and build services using a modern typed language such as Java, Kotlin, Go or Python, or comparable technologies.


• Full-stack capability, including experience with React and TypeScript or equivalent technologies, as well as backend-for-frontend layers


• Understand cloud-native delivery, containers, automated pipelines and production observability.


• Apply a platform mindset by reusing proven capabilities, reducing unnecessary duplication and simplifying technology estates.


• Build security, privacy, reliability and risk controls into solutions from the outset.


• Learn new languages, frameworks and tools according to the needs of the problem.


• Improve engineering outcomes through collaboration, mentoring, code review and well-reasoned design decisions.


• Exposure to technologies such as AWS, Kubernetes, Docker, GitHub Actions, Argo CD, React, TypeScript, Kafka, Grafana or Prometheus will be useful.


• Experience building or operating AI-enabled systems, including model integration, orchestration, evaluation and guardrails, would also be valuable.


• Equivalent tools and transferable experience are welcomed.

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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