Principal Software Engineer

Location: Melbourne, VIC - 357 Collins Street, Sydney CBD Area

Time Type: Full time

Job Description

• You are passionate, driven, flexible and collaborative

• We are a team of big thinkers who are engineering the future of banking

• Together we will build tomorrow’s bank today, using world-leading technology and innovation

Do work that matters:

We're building tomorrow’s bank today, which means we need creative and diverse engineers to help us redefine what customers expect from a bank. Envisioning new technologies that are still waiting to be invented and reimagining products that support our customers and help build Australia’s future economy.

See yourself in our team:

Retail Technology is responsible for the world-leading technology across every aspect of Commonwealth Bank and Bankwest Retail. From innovative product platforms built on AWS using GenAI, to essential tools within our business. We use technology to help our Engineers do their best work to support our customer facing teams to deliver class leading products, experiences, and service.

As a Principal Engineer in the ATM Technology domain, you will play a critical role in shaping the next generation of CBA’s ATM and self-service banking capabilities. You will be responsible for leading the architecture, design, and delivery of highly available, secure, and scalable systems that power our extensive ATM network across Australia. This role demands both deep technical expertise and strong leadership to guide engineering teams in modernising legacy systems, enhancing reliability, and integrating with digital channels.

We’re interested in hearing from people who have experience in

• Technical Leadership:
  Lead the technical strategy and architecture for CBA’s ATM ecosystem, ensuring alignment with enterprise standards and technology roadmaps.

• Solution Design & Delivery:
  Architect end-to-end solutions for ATM software, hardware integration, transaction processing, and back-end services, ensuring performance, resilience, and security.

• Modernisation & Innovation:
  Drive modernisation initiatives across the ATM platform — including migration to cloud-enabled services, implementation of microservices, and enhanced observability.

• Stakeholder Collaboration:
  Partner with product owners, business stakeholders, and cross-functional engineering teams to translate business needs into robust technical solutions.

• Engineering Excellence:
  Establish and enforce best practices in CI/CD, automated testing, monitoring, and system observability to deliver operational excellence and reduce incidents.

• Mentorship & Thought Leadership:
  Coach senior engineers and contribute to building a high-performance engineering culture that values craftsmanship, innovation, and continuous learning.
   

Technical 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 will set you up for success in this team: 

• 10+ years of software engineering experience with 3+ years in a senior/principal technical leadership role.

• Proven experience in ATM software platforms (e.g., NCR, Diebold Nixdorf, KAL), device management, and transaction switching systems.

• Strong proficiency in Java, .NET, or C++, with experience designing distributed systems and RESTful APIs.

• Hands-on knowledge of integration with payments infrastructure (ISO 8583, NDC, XFS, or similar standards).

• Experience with cloud platforms (AWS, GCP, or Azure), container orchestration (Kubernetes), and DevOps pipelines.

• Expertise in designing secure, resilient, and high-availability systems.

• Deep understanding of event-driven and microservices architectures.

• Strong focus on observability, telemetry, and operational monitoring.

• Excellent communication, influencing, and collaboration abilities.

• Proven track record in mentoring and technical leadership across large teams.

• Strategic mindset with the ability to balance long-term vision with short-term delivery.
   

Working with us

Whether you’re passionate about customer service, driven by software engineering, or called by creativity, a career with us is for you.

We support our people with the flexibility to balance where work is done with at least half their time each month connecting in office. We also have many other flexible working options available including changing start and finish times, part-time arrangements and job share to name a few.

Our people bring their diverse backgrounds and unique perspectives to build a respectful, inclusive, and flexible workplace with flexible work locations. We’re looking for people who truly live our values: Care, Courage and Commitment and we’ll offer you great opportunities to develop your career with us.

If this sounds like you, apply today!