Principal .NET Developer (C#, .NET, AWS)

Salary: $1100-1300

• Long Term Contract Opportunity
• Enterprise Scale AI rollout
• $1100-1350+GST a day

NOTE: This is suitable for Australian Citizens and Australian Permanent Residents. You must be based in Sydney, as the client is wanting candidates onsite 3 days a week.

The Opportunity:
We are looking for a Principal .NET & AWS Engineer to join a major, long term technology transformation.
This is not a traditional .NET development position or a pure DevOps role. It is a genuinely hand on engineering opportunity for someone who can design and build modern C# services while taking ownership of the AWS infrastructure, Terraform modules and CI/CD pipelines supporting them.

You will work across application development, cloud architecture and platform engineering, helping build secure, scalable services within a complex enterprise environment. The broader program includes the development of AI enabled capabilities using AWS services such as Amazon Bedrock.

About The Day to Day:

• Design and build production grade APIs, serverless applications and distributed microservices using modern C#/.NET, AWS Lambda and other cloud-native services.
• Make architectural decisions across Lambda, ECS and EKS, including the supporting AWS networking, IAM, security, connectivity and data-service patterns.
• Build and maintain reusable Terraform modules, covering remote state, environment management, validation, testing and controlled infrastructure deployments.
• Design end to end CI/CD pipelines incorporating automated testing, code-quality controls, security scanning, approval gates, deployment strategies and rollback processes.

About You:

• Strong recent hands on experience with modern C#/.NET, including the design and delivery of APIs, microservices and distributed production applications.
• Deep practical AWS knowledge covering VPCs, subnets, routing, security groups, NACLs, PrivateLink, VPC endpoints, IAM roles, policies and trust relationships.
• Commercial experience selecting, implementing and troubleshooting AWS compute services, particularly Lambda, ECS and EKS, within a large or regulated enterprise.
• Advanced Terraform experience, including reusable modules, versioning, remote state, state locking, provider lock files, validation, testing and configuration-drift management.
• Demonstrated experience personally building CI/CD pipelines using GitHub Actions, Jenkins, Azure DevOps, Octopus Deploy or similar, including integrated testing, security scanning and secrets management.
• Worked on Cloud based AI inititives, I.e AWS Bedrock

Important

• This role requires genuine hands on capability across both software development and cloud/platform engineering.
• It will not suit a conventional .NET developer who has only consumed existing AWS environments and deployment pipelines.
• Equally, it will not suit a pure DevOps engineer without strong, recent C#/.NET software-development experience.
• Candidates should be able to explain what they personally designed, built and troubleshot across application code, AWS, Terraform and CI/CD.
• You must be based in Sydney, able to attend the CBD office three days per week, and hold Australian permanent residency or citizenship.

Apply
If you are a Senior or Principal level Engineer with a strong C#/.NET foundation and genuinely hands on AWS, Terraform and CI/CD expertise, please apply with an up to date CV outlining the cloud-native platforms and services you have personally delivered.