Senior Software Engineer - .NET Full Stack

Commonwealth Bank; City of Melbourne; On-site; AUD 140,000 - 200,000; Full time

Job summary

Commonwealth Bank is seeking a Senior Software Engineer to shape digital home lending platforms with end-to-end ownership from design through production. You will use .NET, ASP.NET Core, React and Next.js to build scalable, secure experiences for millions of customers across Australia, collaborating with product, design and business stakeholders in an Agile, CI/CD environment.

You’ll work within the Manage & Own Crew in the Home Lending Lifecycle, driving quality, observability and continuous

Qualifications

• Experience building full-stack applications with .NET/ASP.NET Core and React/Next.js.
• Focus on code quality, performance, accessibility and maintainability.
• Capability to own end-to-end delivery from ideation to production.
• Experience in Agile, CI/CD and secure DevSecOps environments.
• Ability to design secure, scalable APIs and backend services.

Responsibilities

• Own end-to-end software delivery from discovery to deployment and support.
• Collaborate with engineers, product managers and designers to solve complex problems.
• Provide technical guidance and uphold engineering excellence.
• Ensure monitoring, observability and reliability of produced services.
• Apply AI-assisted tooling to accelerate development while maintaining quality.

Skills

Full-stack .NET

React

ASP.NET Core

Next.js

Cloud

DevOps

Security

Agile

Tools

AWS

Docker

Kubernetes

Git

GitHub Actions

Terraform

SonarQube

Jest

Cypress

Postman

JMeter

GitHub Copilot

Roo Code

Claude

OpenAI APIs

Job description

• We're leading an AI-powered engineering transformation at scale.
• You have full-stack .NET, React, cloud and DevOps expertise.
• Together we reinvent home lending for millions of customers.

Do work that matters

Within the Manage & Own Crew in CBA’s Digital Home Buying Domain, you'll play a key role in shaping the technology behind one of the most important financial journeys in our customers’ lives. As a Senior Software Engineer, you'll leverage your full stack expertise across .NET, ASP.NET Core, React and Next.js to design, build and evolve scalable, secure and high-performing applications that help customers manage their home loans with confidence.

This is a true end-to-end engineering role where you'll take ownership of solutions from discovery and design through to development, deployment and ongoing support. With a strong "you build it, you own it" mindset, you'll be empowered to make technical decisions, solve complex challenges and ensure the products you deliver continue to perform, scale and create value long after they reach production.

Working closely with engineers, product teams and business stakeholders, you'll help deliver resilient digital experiences used by millions of customers across Australia. As a senior member of the team, you'll contribute to solution design, champion engineering excellence and provide technical guidance to peers while remaining highly hands-on in the code. You'll take accountability for software quality, reliability, observability and continuous improvement, proactively identifying opportunities to enhance both customer and engineering outcomes. Every feature you own, from inception through to operation, will directly contribute to CBA's vision of building tomorrow's bank today.

See yourself in our team

At CommBank, technology powers every customer experience, and few journeys are more meaningful than helping Australians manage and own their homes. As part of the Manage & Own Crew within the Home Lending Lifecycle, you'll build the digital experiences and platforms that support customers long after settlement, helping them navigate one of life's biggest financial decisions with confidence. Backed by CBA's world-class technology division, you'll work at the intersection of software engineering, data, AI and digital innovation, delivering highly scalable, secure and customer-centric solutions that impact millions of customers across the country.

This is a team that truly owns what it builds. Operating with a full-stack, full-lifecycle engineering model, you'll be involved in everything from architecture and design through to deployment, observability and continuous improvement. Leveraging AI-powered engineering practices, the crew is redefining how software is delivered by increasing quality, accelerating innovation and enabling engineers to focus on higher-value problem solving.

If you're looking for a role where you can shape the future of digital home lending, work with talented engineers at scale, and see your ideas translate into real customer outcomes, this is the team that will elevate your career and expand what's possible.

We’re interested in hearing from people who

• Have strong experience building and delivering full-stack applications using .NET / ASP.NET Core, React and Next.js, with a focus on code quality, performance, accessibility and maintainability.
• Thrive in full-cycle engineering, taking ownership from ideation and problem definition through solution design, build, deployment, operation and continuous improvement.
• Build and own secure, scalable APIs and backend services in .NET, applying modern software engineering practices, domain-driven design principles and performance optimisation techniques.
• Deliver modern web experiences using React and Next.js, leveraging reusable component patterns, responsive design principles and front-end performance best practices.
• Are comfortable working in Agile, CI/CD and DevSecOps environments, contributing to automation, observability, operational excellence and reliable production outcomes.
• Take ownership of solutions in production, using monitoring, telemetry and customer feedback to identify opportunities, resolve issues and continuously improve services.
• Leverage AI-assisted engineering tools to accelerate development, testing and delivery while maintaining high standards of security, quality and maintainability.
• Understand the risks associated with AI-generated outputs, including inaccurate code, vulnerabilities and dependency risks, and apply appropriate validation, testing and review practices.
• Collaborate effectively with engineers, product managers and designers to solve complex customer problems, share knowledge and deliver high-quality outcomes as part of a high-performing team.

Tech skills

We don't expect you to know everything, but experience in several of the following will set you up for success:

• Back End: .NET, ASP.NET Core, C#, REST APIs, Microservices.
• Front End: React, Next.js, JavaScript, TypeScript, Temporal.
• Cloud: AWS, Docker, Kubernetes.
• Architecture: Microservices, Event-Driven Architecture (EDA), Domain-Driven Design (DDD), REST.
• AI: GitHub Copilot, Roo Code, Claude, OpenAI APIs, LLMs.
• DevSecOps: Git, GitHub Actions, CI/CD, Terraform, SonarQube.
• Testing: TDD, API Testing, xUnit, NUnit, Jest, Cypress, Postman, Jmeter.
• Observability: Prometheus, Grafana, OpenTelemetry.
• End-to-End System Design: Distributed Systems, API Design, System Architecture.

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: 10/09/2026