Mid to Senior Full Stack .NET Engineer | 6-Month Rolling Contract

SustainRecruit; Sydney; Hybrid; AUD 129,000 - 148,000; Full time

Job summary

SustainRecruit in Sydney is seeking a mid to senior Full Stack .NET Engineer on a 6-month rolling contract. You will work hybrid, 2-3 days in the office, spanning .NET backend and React frontend, owning features from design through release.

At senior level, contribute to technical design decisions, mentor engineers, review code, and collaborate across teams while delivering robust REST APIs and cloud‑native solutions in Azure.

Qualifications

• 4–5 years of commercial software development experience at mid level.
• Hands-on with C#, modern .NET and ASP.NET Core Web APIs.
• Commercial React experience, ideally with TypeScript.
• Experience with SQL Server, automated testing and CI/CD in Azure.

Responsibilities

• Build full stack features using .NET, React and TypeScript.
• Develop REST APIs with ASP.NET Core and integrate with services.
• Migrate functionality from legacy apps to the new platform.
• Write automated tests and deploy changes through Azure DevOps pipelines.

Skills

C#

.NET

ASP.NET Core

React

TypeScript

SQL Server

Azure DevOps

Tools

Azure DevOps

SQL Server

Job description

Mid to Senior Full Stack .NET Engineer | 6-Month Rolling Contract

Location Sydney, hybrid with 2-3 days in the office
Daily rate $700-$800 per day including super, depending on experience
Tech stack C#, .NET, ASP.NET Core, React, TypeScript, SQL Server, Azure and Azure DevOps

The opportunity A fintech organisation is building a new digital platform and modernising its existing applications. You’ll join a small agile team and work across the .NET backend and React front end, owning features from design through to release. At the senior end, you’ll also contribute to technical design decisions and support other engineers through code reviews and mentoring. What you’ll do

• Build full stack features using .NET, React and TypeScript.
• Develop REST APIs with ASP.NET Core and integrate with internal and third-party services.
• Work with SQL Server and help migrate functionality from legacy applications to the new platform.
• Write automated tests and deploy changes through Azure DevOps pipelines.

What you’ll bring

• Around 4-5 years of commercial software development experience at mid level, with broader technical ownership at senior level.
• Hands-on experience with C#, modern .NET and ASP.NET Core Web APIs.
• Commercial React experience, ideally with TypeScript.
• Experience with SQL Server, automated testing and CI/CD, ideally in an Azure environment.