Principal Software Engineer – Full Stack (.NET / React, Next.js) at Commonwealth Bank

Sydney, New South Wales, Australia -

Full Time

Start Date

Immediate

Expiry Date

18 Sep, 26

Salary

0.0

Posted On

20 Jun, 26

Experience

10 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

C#, .NET Core, React.js, Next.js, TypeScript, AWS, GraphQL, PostgreSQL, Docker, Kubernetes, CI/CD, Microservices, DevSecOps, System Architecture, API Design, GenAI

Industry

Financial Services

Description

We're embarking on an engineering transformation with the key focus on quality engineering and automation. You have knowledge that spans both development and operations, including coding, infrastructure management, system admin/engineering and DevOps Toolchains. Together we will build tomorrow’s bank today, using world-leading engineering, 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. As a Principal Software Engineer in the Speciality Products Platforms Crew within the Digital & Technology Home Buying Division, you shape the technical direction behind products that support millions of customers through their home-buying journey. Reporting to the Crew Tech Lead, you’re the technical expert driving architectural strategy and delivering full-stack, end-to-end solutions across .NET/.NET Core, C#, AWS, and modern front-end frameworks like Next.js, TypeScript, and React. With full-cycle ownership, influence, design, build, test, deploy, and run, you ensure our platforms are scalable, intuitive, and world-class. You’ll lead major engineering initiatives, from modernising backend services to building new customer-facing experiences. As the Crew’s technical SME, you uplift a 250-person engineering organisation through design leadership, mentoring, coaching, and technical excellence. Even without direct reports, you set the bar, guiding engineers, shaping delivery approaches, and inspiring teams to innovate boldly. This is a role where your expertise drives outcomes, your leadership energises the Crew, and your work helps create exciting, high-impact Home Buying products people love to use, and love to build. See yourself in our team: CBA Technology powers the bank’s digital experiences and provides the platforms, data, cyber security, and infrastructure that support every CBA division. The team also delivers modern workplace technology for more than 53,000 employees, ensuring they have the tools and resources to work smarter, collaborate effectively, and deliver exceptional outcomes for customers. The Speciality Products Platforms Crew is a key part of the Group’s Digital & Technology Home Buying function, powering the specialised platforms that make home ownership easier and smarter for millions of Australians. This team builds the engines behind complex home-buying journeys, valuation services, property data platforms, lending decision tools, calculators, and high-scale APIs that support every step of the customer experience. It’s innovation with real impact, delivered through modern cloud-native architecture, event-driven systems, and scalable engineering. Joining this Crew means working with a high-energy team of engineers, designers, and product leaders who solve tough technical problems and deliver platforms used across the organisation. The team owns everything end to end designing, building, deploying, and running mission-critical services, while constantly pushing for better performance, reliability, and customer outcomes. If you want to influence technical direction, build meaningful products, and work in a team leading digital innovation in Home Buying, this is where you want to be. We’re interested in hearing from people who: Lead end-to-end technical strategy and solution design for the Home Buying crew, acting as the engineering SME for scalable, secure, cloud-native platforms. Stay hands-on delivering full-stack features across .NET/.NET Core, C#, TypeScript/Next.js, SQL, GraphQL and API integrations. Align engineering across a ~250-person crew, driving consistent patterns, standards and best practices across home-loan, pricing, LMI and API services. Own and optimise end-to-end Home Buying customer journeys, designing solutions that remove pain points and create seamless digital experiences. Architect high-performance microservices, GraphQL BFFs and data-access layers with a focus on resilience, scalability and quality. Champion DevSecOps excellence CI/CD, automated testing, cloud pipelines, observability, secure coding and operational readiness. Partner closely with product, design and business teams, while mentoring engineers and uplifting modern engineering practices, including AI-assisted development. Tech skills Languages & Frameworks: Deep expertise in C#, .NET/.NET Core, MVC, Web API, with strong full-stack capability across React.js, Next.js, and modern JavaScript frameworks like NestJS, Apollo GraphQL, Prisma ORM. Cloud & Architecture: Advanced AWS cloud-native engineering, microservices design, distributed systems, and scalable API architectures (REST & GraphQL). Databases: Proficient with PostgreSQL and Oracle, including schema design, optimisation, and robust data-access patterns. DevOps & Automation: Strong CI/CD engineering using GitHub Actions and TeamCity, with a focus on automation, quality, and DevSecOps principles. Containers & Runtime: Hands-on experience with Docker and Kubernetes for orchestration, deployment, and cloud-native operations. Monitoring & Observability: Solid understanding of Prometheus/Grafana, Splunk, and AWS CloudWatch for proactive monitoring and operational excellence. AI-Enhanced Engineering: Skilled with GenAI tools such as Cline, Cursor, and AWS Bedrock, with awareness of AI/ML and LLM concepts to integrate intelligent capabilities. 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. Advertising End Date: 19/07/2026 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. 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 every day. Here, you’ll thrive. You’ll be supported when faced with challenges, and empowered to tackle new opportunities. We really love working here, and we think you will too.

Responsibilities

Lead the technical strategy and architectural direction for the Home Buying platforms, delivering scalable full-stack solutions. Mentor a large engineering organization and drive engineering excellence across backend services and customer-facing experiences.