Staff Software Engineer – Fullstack .Net

Staff Software Engineer – Fullstack .Net (Banking Terminals & Payments)

Do work that matters

You'll help shape the next generation of our banking terminal and payments capabilities through world-class engineering and systems design. From architecting resilient distributed solutions to hands-on implementation and automation, your work will ensure our platforms are scalable, secure, and production ready — powering millions of reliable transactions across the Commonwealth Bank network.

Your focus will span architecture, system design, software development, integration, and continuous delivery, with a clear path toward becoming a Full-Cycle Engineer who drives solutions from concept to production.

See yourself in our team

The ATM Engineering Chapter in the CSN Crew is responsible for delivering robust and innovative engineering solutions that power the Bank's ATM and Digital ecosystems.

You'll work with a team of seasoned engineers to design, build, and evolve the core software and infrastructure that underpins our ATM network. You'll contribute to modernizing legacy systems, improving scalability and fault tolerance, and ensuring seamless integration between hardware, middleware, and payments services.

As part of a high-performing engineering culture, you'll leverage best practices in system architecture, observability, DevOps, and performance optimization, while experimenting with emerging tools and technologies to improve reliability and speed of delivery.

We're interested in hearing from people who:

• Have deep experience in system design, software architecture, and large-scale distributed systems, ideally within payments or banking infrastructure.

• Are passionate about building end-to-end solutions - from architectural vision and design patterns to implementation, deployment, and runtime operations.

• Drive engineering excellence through clean architecture, API design, integration patterns, and performance optimization.

• Embrace automation, CI/CD, and infrastructure as code, enabling consistent, secure, and reliable software delivery.

• Communicate early and clearly, raising design considerations and collaborating effectively across teams and stakeholders.

• Value collaboration, innovation, and ownership, and are eager to contribute to the evolution of our engineering ecosystem.

Tech Skills

We use a broad range of tools, languages, and frameworks. We don't expect you to know them all but experience or exposure with some of these (or equivalents) will set you up for success in this team;

• Extensive Experience in designing and implementing scalable, maintainable and reliable software solutions using .NET framework, JavaScript frameworks (Next JS), APIs and databases such as Aurora

• Backend experience with .NET (NodeJS is a bonus)

• Frontend experience with , , Angular

• CI/CD Tools – Team City, Jenkins, Octopus or GitHub Actions etc

• Observability tools such as Splunk, Prometheus & Grafana

• Cloud knowledge with AWS & Containerization using dockers

• Working knowledge of AI/ML and Gen AI applications and how they can enhance software engineering processes to improve productivity

• Proficiency in one or more programming languages (e.g., Python, TypeScript or C#) and experience developing microservices architecture on cloud platforms (AWS & Azure)

• A keen interest in researching new AI tooling and you are a daily user of AI coding assistants such as Cursor, Continue, GitHub CoPilot, Aider, Cline, etc.

• Knowledge of or experience in Anthropic Claude, Llama, LiteLLM, Cursor, windsurf / Codeium, VO Vercel, Continue, Aider, Cline, Langchain, Langgraph, Hugging Face will be highly desirable

• Proficiency in agile development methodologies and iterative experimentation from ideation to prototype to pilot to product

• Experience working on ATMs Hardware (preferably Diebold Nixdorf) or POS and Diebold's ATM software applications suite.

• Demonstrated experience in testing and performing L3 scheme certifications on ATM/POS'S hardware devices.

• Hands on experience in scheme simulators such as MDFS, VTS, UPI, UL Brand Test Tool etc.

• Familiarity with banking switches like Connex on HP, Base24, or similar is highly desired.

• Good understanding of ISO8583/ISO20022/AS2805 message formats.

Working with us

Whether you're passionate about customer service, driven by data, or called by creativity, a career with CommBank is for you.
We support our people with the flexibility to balance where work is done with at least half your time each month connecting in the Sydney office. We also offer flexible options including adjusted start/finish times, part‑time and job share.

Here, you'll thrive—supported through challenges and empowered with new opportunities. We're hiring engineers across Australia, with technology hubs in major cities. We really love working here, and we think you will too.

If this sounds like you, apply now

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.

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