Commonwealth Bank
Staff Software Engineer - .NET / API
Commonwealth BankAustralia11 days ago
Full-timeEngineering, Information Technology
  • We're embarking on an engineering transformation with the key focus on Full cycle, Full Stack solutions.
  • 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 Staff Software Engineer in the E2E Service Journeys Chapter within our dynamic Everyday Banking division, you’ll be at the forefront of work that truly matters—engineering the future of how millions of customers interact with the CommBank app every single day. You’ll tackle complex, large-scale challenges by building robust, high-performance APIs and elegant .NET backend solutions, architecting microservices that power seamless, secure and intelligent banking experiences.

Strategically embedded within the business, you’ll dive deep into real customer pain points and shape how technology, automation and AI can transform the way payments are processed across Australia. As the backend SME, you’ll influence innovative greenfield initiatives and critical BAU enhancements alike that will help millions of customers have amazing digital wallet and payment experiences.

This is your opportunity to engineer with purpose, innovate at scale, and deliver customer-first experiences that redefine digital banking.

See yourself in our team:

CBA’s technology unit powers the bank’s leading digital banking experience by driving digital delivery, data and analytics, core technology, infrastructure, and cyber and physical security. It safeguards the organisation’s resilience across every division while enabling seamless, secure customer experiences. It also elevates the workplace for more than 53,000 employees by providing cutting-edge tools and technology that help teams collaborate, innovate, and deliver more for customers.

Join our E2E Service Journey Crew within CBA’s Everyday Banking Division—home to the engineers who shape and power the everyday experiences of the CommBank app. We build secure, scalable and high-performing services that support complex new product initiatives and enhance the digital journeys millions of customers rely on every day. Our work blends cutting-edge technology, automation and modern engineering practices to deliver meaningful, customer-focused outcomes.

We’re a team that thrives on innovation, exploring how AI and next-generation tech can accelerate our roadmap and transform how customers interact with banking. Here, Staff Software Engineers play a pivotal role in driving technical excellence, influencing architecture and building intelligent, future-ready solutions that stand out in Australia’s most-used banking app.

We’re interested in hearing from people who:

  • Lead the design and development of scalable, secure backend APIs in .NET/.NET Core, with a strong focus on high-quality enterprise integrations and reliable downstream services. You’ll be the technical backbone ensuring our platforms run smoothly at scale.
  • Play a major role in shaping feature strategy and solution direction, partnering across multiple squads to align architecture, dependencies, and delivery plans. Your voice will influence how we build now and into the future.
  • Bring strong architecture and solution design expertise to simplify complex problems and define clear, long-term platform patterns. You’ll help create elegant, resilient systems that scale with customer needs.
  • Work primarily as a backend engineer while jumping into front-end (React/Next.js) when needed to ensure seamless customer flows. You'll help create end-to-end solutions that feel cohesive and intuitive
  • Build new digital capabilities for the CommBank app, including tokenisation, Apple/Google Pay, Click to Pay and more. Your work will directly power experiences used by millions daily.
  • Drive the safe, practical adoption of AI-powered engineering tools to increase quality, speed, and automation. You’ll mentor engineers, uplift the chapter, and help shape modern engineering practices across the team.

Tech Skills

  • Backend Engineering (.NET/C#): Delivers high-performance backend services and enterprise-grade microservices using .NET/.NET Core and clean architectural patterns.
  • API & Integration Design: Builds secure, scalable REST/SOAP APIs with strong downstream integrations across complex distributed systems.
  • Cloud Engineering (AWS): Designs and operates cloud-native solutions using Lambda, ECS/EKS, API Gateway, SQS/SNS, DynamoDB, and CloudWatch.
  • Quality, Security & Observability: Ensures reliability through automated testing (xUnit/NUnit), secure API practices (OAuth, mTLS), and deep monitoring/alerting.
  • DevOps & Automation: Creates fully automated CI/CD pipelines and production-ready workloads using Docker, Kubernetes, Terraform, and modern DevOps tooling.
  • Frontend Capability: Uses React, Next.js, and TypeScript to deliver clean front-end interfaces and integrate them seamlessly with backend APIs.
  • AI-Driven Delivery: Leverages AI tools to accelerate coding, testing, documentation, and solution design with a strong customer-centric engineering approach.

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.

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Advertising End Date: 16/12/2025

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