We're building fraud and scam platforms that protect investors.
You have deep .NET, AWS and distributed systems expertise.
Together we deliver secure services trusted by millions.
Do work that matters:
At CommSec, we're helping more Australians take control of their financial future through secure, intuitive and high-performing digital investing experiences. As a Staff Software Engineer within the Customer Management & Protect - Fraud & Scams Squad, part of the wider Digital & Customer Crew and CommSec Technology domain, you’ll lead strategic, end-to-end technology initiatives that help protect customers from fraud and scams at scale.
Acting as a backend technical authority and reporting into the Chapter Lead, you’ll design and build critical API services and microservices that power secure, reliable and high-performing customer experiences.
Working across the full technology lifecycle, from architecture and engineering through to delivery and optimisation, you’ll provide technical leadership, shape engineering standards and guide complex solutions that safeguard millions of customer interactions. This is a role where deep .NET and full stack expertise directly translates into real-world impact, helping customers stay protected while driving the future of digital banking.
See yourself in our team:
The Customer Management & Protect - Fraud & Scams Squad sits within the Digital & Customer Crew and CommSec Technology domain, building the platforms, services and controls that protect customers from fraud, scams and financial crime.
The squad plays a critical role in supporting CommSec, the Group’s leading trading platform, helping ensure customers can invest and trade with confidence. Leveraging modern .NET engineering, cloud-native platforms, APIs and microservices, the squad delivers secure, scalable and resilient technology across the full customer journey.
By combining real-time detection, prevention and customer protection capabilities with modern engineering practices, the team tackles complex security challenges at scale, safeguarding millions of digital interactions, strengthening customer trust and enabling safe, seamless investing and banking experiences.
We’re interested in hearing from people who:
Have deep expertise in .NET, C# and AWS, with a proven track record of designing, building and operating scalable cloud-native applications.
Have experience owning the full software delivery lifecycle from ideation and architecture through development, testing, deployment, operations and ongoing support, taking accountability for outcomes in a "you build it, you run it" environment.
Have designed and delivered large-scale REST APIs, microservices and distributed systems, with a strong focus on scalability, resilience, security and performance.
Demonstrate strong architectural capability, driving technical decisions and influencing platform, integration and cloud-native solution design across engineering teams
Tech skills
We don't expect you to know everything, but experience in several of the following will set you up for success:
Architecture & Design: System design, solution architecture, technical leadership, architecture assessments.
Back End: C#, .NET, .NET Core, REST APIs, Microservices, Backend Services, Distributed Systems.
Cloud: AWS (preferred) and/or other cloud platforms is highly valued
Observability: Monitoring, logging, tracing, alerting, production support and performance analysis.
Security: Authentication, authorisation, secure API design, secrets management, secure software delivery.
Front End: React, TypeScript (nice-to-have for full stack contribution).
Database: SQL, MSSQL, NoSQL databases, persistence and integration patterns.
DevOps: CI/CD, Docker, Kubernetes, automation and deployment practices.
Engineering Practices: Automated testing, performance optimisation, reliability, operational readiness and ownership.
Other: Java considered if the candidate is willing to transition into .NET.
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.
We're aware of some accessibility issues on this site, particularly for screen reader users. We want to make finding your dream job as easy as possible, so if you require additional support please contact HR Direct on 1800 989 696.
Skills Required
- Own full lifecycle delivery from ideation through production and support
- Design and deliver scalable Android solutions and define architectural direction
- Hands-on experience with Kotlin, Android SDK and modern Android frameworks (including Jetpack Compose)
- Experience designing modular Android architectures using MVVM, MVI or Clean Architecture
- Experience building secure, reliable Android apps integrating with REST and GraphQL APIs
- Experience improving delivery through CI/CD practices and tools (including GitHub Actions)
- Applied engineering excellence: automated testing, UI testing, static analysis and code quality standards
- Experience optimising Android app performance, observability and reliability using monitoring/crash tools
- Proven ability to mentor engineers and provide technical leadership across a chapter
- Experience with cloud platforms (AWS, Microsoft Azure)
- Familiarity with testing tools (JUnit, Postman, REST Assured, JMeter, BlazeMeter) and observability tools (Prometheus, Grafana, Splunk, AWS CloudWatch)
Commonwealth Bank Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Commonwealth Bank and has not been reviewed or approved by Commonwealth Bank.
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Leave & Time Off Breadth — The bank offers additional Life Leave, the option to purchase up to four extra weeks, pet leave, and paid volunteering leave alongside flexible-working options. Public materials indicate these leave features compare well within Australian banking.
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Parental & Family Support — Permanent employees can access up to 18 weeks of paid parental leave, and superannuation is paid for up to 34 weeks of unpaid parental leave. These provisions extend support for new parents beyond standard settings.
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Wellbeing & Lifestyle Benefits — Access includes CBHS Health Fund, Fitness Passport, a 24/7 wellbeing platform with telehealth, an Employee Assistance Program, and employer‑paid income protection for up to two years, alongside staff banking perks and share plans. This combination provides day‑to‑day value across health, protection, and financial perks.
Commonwealth Bank Insights
What We Do
Australia’s leading provider of financial services including retail, premium, business and institutional banking, funds management, superannuation, insurance, investment and sharebroking products and services. We are a business with more than 800,000 shareholders and over 52,000 employees. We offer a full range of financial services to help all Australians build and manage their finances.
