This is a 6-month contract opportunity for a mid-level C# / AWS Software Engineer to work on modern, cloud-native services supporting large-scale retail and customer-facing platforms. Based in Melbourne, you will join an engineering team building and operating serverless systems that directly underpin critical customer journeys.
You will work across event-driven architectures, order and loyalty services, and high-volume integrations, contributing code that runs in production every day. This role suits an engineer who enjoys clean C# code, pragmatic architecture, and seeing their work deliver real-world outcomes.
You will be trusted to own features end to end, collaborate closely with experienced engineers, and help evolve systems where reliability, observability, and maintainability matter.
This is: what you’ll do
- Deliver production-ready C#/.NET services running on AWS serverless infrastructure
- Design and build RESTful APIs with strong validation, security, and error handling
- Develop event-driven integrations using AWS services such as SQS and EventBridge
- Collaborate on persistence models using PostgreSQL and DynamoDB
- Improve reliability, performance, and observability across existing services
- Diagnose and resolve production issues using logs, metrics, and tracing
- Contribute to architecture discussions and technical decision-making
- Write clean, well-tested code with clear separation of concerns
- Support junior engineers through code reviews and technical guidance
This is: what you’ll need
- Commercial experience with C# and .NET (ASP.NET Core, async patterns)
- Hands-on AWS serverless experience including Lambda and API Gateway
- Strong API design and integration experience
- Experience with PostgreSQL and DynamoDB
- Infrastructure as code exposure using SAM or CloudFormation
- Understanding of event-driven and integration patterns
- A pragmatic engineering mindset with strong problem-solving skills
This is: the perks
- Work on production systems that support high-volume, business-critical workflows
- End-to-end ownership across design, build, and deployment
- Exposure to modern AWS serverless architecture at scale
- A contract that adds real depth and credibility to your engineering portfolio
This is: for good
Apply with purpose. Be part of a placement that gives back. For every role we fill, we donate to a charity of the client’s choice. We’ve surpassed $1 million donated and we’re just getting started.
This is: what's next
Apply now or reach out to:
Elton Kelly
Principal Consultant, Natural Selection Group
M: 0405 294 375
E: elton.kelly@naturalselectiongroup.com.au