Senior .NET Cloud Engineer | Serverless & Security focused

Xpt Software Australia Pty; Central Coast; On-site; AUD 100,000 - 160,000; Full time

Job summary

Xpt Software Australia Pty is seeking a senior .NET developer to continue enhancing a SaaS platform. You will strengthen API security, migrate legacy components to serverless architecture, and optimise performance.

Responsibilities include refining secret handling, building RESTful services, and delivering a real-time React dashboard for system health and CI metrics. Suitable for highly experienced engineers with AWS experience.

Qualifications

• 8+ years of professional experience in .NET ecosystem.
• Experience building RESTful APIs and microservices.
• Experience with F#, SQL Server a plus.
• Hands-on with AWS services and serverless architectures.

Responsibilities

• Resolved critical directory traversal security vulnerabilities across the SaaS platform.
• Refactored client-side secret handling to server-side processing and integrated AWS SSM Parameter Store.
• Designed and implemented AWS Lambda optimization strategies to reduce p95 latency by ~30%.
• Migrated legacy .NET 4.8 components to a scalable serverless architecture using AWS Lambda and API Gateway.
• Delivered a React-based operational dashboard for real-time system health monitoring and incidents.

Skills

C#

.NET Core

.NET 8

ASP.NET MVC

Entity Framework

REST APIs

Hang fire

Microservices

Job description

Xpt Software Australia Pty is seeking a senior .NET developer to continue enhancing a SaaS platform. You will strengthen API security, migrate legacy components to serverless architecture, and optimise performance.

Responsibilities include refining secret handling, building RESTful services, and delivering a real-time React dashboard for system health and CI metrics. Suitable for highly experienced engineers with AWS experience.