Principal Software Engineer (.NET, Application Modernisation Exp)

Principal Software Engineer (.NET, Application Modernisation Exp)

• You are a problem solver with a strong background in software engineering

• We are a growing team within the bank and constantly involved in industry changing solutions

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

Do work that matters
 

Join RDIA Crew to lead engineering for our core risk applications. Your primary focus is modern, reliable software engineering across .NET and Python on AWS, building secure APIs and microservices, uplifting CI/CD, and improving resilience and observability. Gen AI is a secondary enabler Data is a supporting concern, primarily consuming producer-led data products and event streams.

See yourself in our team

RDIA is modernizing Farlo and PD Tools with AWS-first approach, ArgoCD-managed deployments, and strong API standards. You will collaborate with Product Owners, Risk Technology and adjacent crews to deliver platform upgrades, AI solutions, reduce toil, and meet tech-control and privacy obligations.

Key Responsibilities

• Own engineering for PD Tools and Farlo services: design, build, and operate .NET/Python microservices and REST APIs with OpenAPI specs and Kong gateway integration.

• Modernise legacy components and workflows; drive architectural refactors, performance tuning, and reliability improvements.        

• Establish golden paths for CI/CD (GitHub Actions + ArgoCD), automated testing (unit, integration, performance), and progressive delivery.

• Embed observability and operability (Grafana, Prometheus, PagerDuty) with SLOs/SLIs and production readiness reviews.

• Partner with product and platform teams to plan increments, de-risk changes, and deliver measurable outcomes for risk operations.

• Ensure compliance with Tech Controls and Privacy Front Door processes; champion secure coding, secrets management, and encryption.

• Drive the integration of GenAI capabilities to make our applications more intelligent and adaptive, embedding AI-driven features that enhance user experience and operational efficiency.

• Apply knowledge of MCP, A2A, and other relevant frameworks to strengthen solution architecture and interoperability.

• Consume producer-led data products (S3/Iceberg, Kafka) as inputs to PD Tools/Farlo features; avoid tight coupling to data storage layers.

We’re interested in hearing from people who:

• Are curious, life-long learners

• Can Influence the future of the company’s technology estate every day

• Can create a culture focused on accelerating the adoption of new and emerging technologies

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 (or equivalents) will set you up for success in this team;

• Languages & Frameworks: C#/.NET Core, Python; REST APIs, microservices, asynchronous patterns; familiarity with Node advantageous.

• Hands‑on experience in modernising complex applications in the last 3–4 years

• Strong exp in building, operating and improving enterprise-grade software; track record of delivering outcomes in regulated environments.

• Hands-on leadership: Influencing GM‑level stakeholders on solution choices, assess multiple technology stacks and architectural approaches, evaluating trade‑offs and risks, mentoring engineers, leading teams technically, setting coding standards, enabling autonomy with clear guardrails.

• Risk mindset: proactively manage security, privacy, resiliency and change risk; evidence-based decision making.

• Cloud & Platform: AWS (EKS, S3, EMR/Redshift optional), containerisation, infrastructure-as-code.

• CI/CD & DevSecOps: GitHub Actions, ArgoCD; supply-chain security, automated quality gates.

• Observability & Reliability: Splunk, Grafana, Prometheus, PagerDuty; performance engineering and chaos testing.

• GenAI: Agent Frameworks (Langgraph, Pydantic etc), MCP (for tools), AWS bedrock and familiarity with AI Evaluation.

Working with us

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

Our people bring their diverse backgrounds and unique perspectives to build a respectful, inclusive, and flexible workplace with flexible work locations. One where we’re driven by our values, and supported to share ideas, initiatives, and energy. One where making a positive impact for customers, communities and each other is part of our everyday.

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. Talk to us about how these arrangements might work in the role you’re interested in.

If this sounds like the role for you then we would love to hear from you. Apply today!