Senior Software Engineer- C#, .Net

Senior Software Engineer (C#, .Net)

Business Banking Technology | Sydney or Melbourne

You are a deeply hands-on engineer who loves solving complex problems.

We are high-performing engineers rebuilding Small Business Banking from the ground up.

Together we’re building tomorrow’s business bank today.

Do work that matters

We built Australia’s number one banking app — and then rebuilt it.

Now, we’re transforming the Small Business Banking experience within NetBank. We’re creating a modern, personalised digital platform designed specifically for business customers — distinct from retail and corporate banking.

This is a rare opportunity to shape a critical rebuild at scale, used by millions of customers.

See yourself in our team

As a Senior Software Engineer, you’ll join a squad delivering the new Small Business Banking experience. You will play a key role in supporting architecture, raising engineering standards and hands-on engineering.

You will spend the majority of your time designing and building production systems, while influencing technical direction across the crew.

You will:

Design and develop scalable microservices and APIs

Define and influence architecture for enterprise-scale applications

Improve engineering standards, quality and secure coding practices

Guide integration with internal and third-party services

Contribute to safe deployments through CI/CD, automation and observability

Drive pragmatic, high-quality engineering decisions

We’re looking for engineers who

Are genuinely hands-on and comfortable owning complex systems end-to-end

Have strong backend engineering capability (REST APIs, microservices)

Have designed or contributed to enterprise-scale architecture

Understand security, reliability and performance at scale

Thrive in collaborative environments and challenge ideas constructively

Care deeply about code quality, simplicity and long-term maintainability

Technical capability

We use a broad range of technologies. You don’t need all of them — but strong engineering fundamentals are essential.

Our ecosystem includes:

Backend

C# .NET Core, REST APIs, WebAPI

Microservices and API integration

Frontend

Next.js, React, Angular, TypeScript

Cloud & DevOps

AWS or Azure

Kubernetes, Docker

CI/CD (GitHub Actions, TeamCity, Octopus, Azure DevOps)

Infrastructure as Code (CloudFormation)

Logging & observability (Splunk, monitoring tools)

Data

MSSQL, Oracle, Snowflake

NoSQL / DocumentDB

Experience with event-driven architecture (Kafka) is beneficial.

If you’re a senior engineer who loves being deep in the code— we’d love to hear from you.

We support our people with the flexibility to balance where work is done with at least half your time each month connecting in the office.

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: 12/06/2026