Senior Software Engineer (C#, .Net)
Business Banking Technology | Sydney or Melbourne
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.
Role Overview
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.
Responsibilities
* 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
Qualities and Experience
* Hands‐on and comfortable owning complex systems end‐to‐end
* Strong backend engineering capability (REST APIs, microservices)
* Experience designing or contributing to enterprise‐scale architecture
* Understanding of security, reliability and performance at scale
* Collaborative with challenge ideas constructively
* Deep care about code quality, simplicity and long‐term maintainability
Technical Stack
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.
Please note: 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.
Advertising End Date: 12/06/2026
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