Senior Software Engineer - .NET Full Stack

About the role

CommBank is looking for a Senior Software Engineer with full-stack .NET, React, cloud and DevOps expertise to join its Manage & Own Crew in the Digital Home Buying Domain. The role shapes the technology behind home lending, helping customers manage their home loans, and is described as end-to-end: from discovery and design through development, deployment and ongoing support.

Key responsibilities

• Design, build and evolve scalable, secure, high-performing applications using .NET, ASP.NET Core, React and Next.js.
• Take ownership of solutions from ideation and design through to deployment, observability and continuous improvement.
• Work with engineers, product teams and business stakeholders to deliver resilient digital experiences used by millions of customers.
• Contribute to solution design, champion engineering excellence and give technical guidance to peers while staying hands-on in the code.
• Own software quality, reliability and observability, and use monitoring, telemetry and customer feedback to improve services.
• Leverage AI-assisted engineering tools while validating AI-generated code and guarding against vulnerabilities and dependency risks.

Required profile

• Strong experience building full-stack applications with .NET / ASP.NET Core, React and Next.js, focused on code quality, performance, accessibility and maintainability.
• Thrives in full-cycle engineering, owning solutions from problem definition through to operation.
• Builds secure, scalable APIs and backend services in .NET, applying domain-driven design and performance optimisation.
• Delivers modern web experiences with React and Next.js, using reusable components and responsive design.
• Comfortable in Agile, CI/CD and DevSecOps environments, and able to collaborate with product managers and designers.

Required skills

• Back end.NET, ASP.NET Core, C#, REST APIs, microservices.
• Front end: React, Next.js, JavaScript, TypeScript.
• Cloud: AWS, Docker, Kubernetes.
• Architecture: microservices, event-driven architecture, domain-driven design.
• DevSecOps: Git, GitHub Actions, CI/CD, Terraform, SonarQube.
• Testing: TDD, xUnit, NUnit, Jest, Cypress, Postman, JMeter.
• Observability: Prometheus, Grafana, OpenTelemetry.