Senior Full-Stack Engineer: Cloud-Native .NET to React

GFL Environmental Inc.; Vaughan; On-site; CAD 110,000 - 160,000; Full time

Job summary

GFL Environmental Inc. in Vaughan, Canada seeks a Senior Full-Stack Developer to lead the modernization of core enterprise apps. You will deconstruct legacy .NET 4.8 MVC monoliths and re-engineer them into .NET 6+/microservices with a React frontend hosted on AWS.

The role is not maintenance; it focuses on re-engineering for scalability, cloud-native design, and robust RESTful APIs. You will drive CI/CD pipelines and collaborate with cross-functional teams to deliver high-performance solutions.

Qualifications

• 6+ years of full-stack development experience.
• Experience modernizing .NET Framework 4.8 apps to .NET 6+/microservices.
• Strong React frontend development with TypeScript.

Responsibilities

• Legacy Deconstruction: analyze .NET 4.8 MVC apps to map logic and integration points.
• Architecture Migration: move from monoliths to microservices/clean architecture.
• Backend Modernization: rewrite C# to .NET 6/8+ for performance and cross-platform support.
• Frontend Revolution: build a React SPA with TypeScript and modern state management.
• Cloud Orchestration: deploy on AWS using Lambda, ECS/Fargate, S3, and RDS.
• API Design: create robust RESTful APIs bridging frontend and backend.
• CI/CD Implementation: automate build/test/deploy for .NET and React.

Skills

Backend .NET

Frontend React

C#/ASP.NET Core

TypeScript

SQL Server

AWS

Microservices

CI/CD

RESTful APIs

GitHub Actions

Tools

Vite/Webpack

Tailwind CSS

Material UI

Docker

GitHub Actions

Job description

GFL Environmental Inc. in Vaughan, Canada seeks a Senior Full-Stack Developer to lead the modernization of core enterprise apps. You will deconstruct legacy .NET 4.8 MVC monoliths and re-engineer them into .NET 6+/microservices with a React frontend hosted on AWS.

The role is not maintenance; it focuses on re-engineering for scalability, cloud-native design, and robust RESTful APIs. You will drive CI/CD pipelines and collaborate with cross-functional teams to deliver high-performance solutions.