Senior Software Engineer
Vaughan, Ontario
Role Overview
We are seeking a highly skilled Senior Full-Stack Developer with 6+ years of experience to lead the digital transformation of our core enterprise applications. You will be responsible for the end-to-end modernization of legacy .NET Framework 4.8 MVC monoliths into high-performance, .NET 6+ and up microservices and APIs, paired with a modern React frontend and hosted on AWS.
This is not a "maintenance" role; it is a "re-engineering" role. You will bridge the gap between reliable legacy logic and the future-proof scalability of modern cloud architecture.
Key Responsibilities
Legacy Deconstruction: Analyze existing .NET 4.8 MVC applications to identify business logic, dependencies, and integration points for migration.
Architecture Migration: Lead the transition from monolithic architectures to modern design patterns (Microservices, Hexagonal, or Clean Architecture).
Backend Modernization: Rewrite and refactor legacy C# code to .NET 6/8+, implementing cross-platform compatibility and improved performance.
Frontend Revolution: Replace Razor/Server-side rendering with a decoupled, state-of-the-art React SPA (Single Page Application) using TypeScript and modern state management (Redux Toolkit, TanStack Query).
Cloud Orchestration: Design and deploy the modernized stack on AWS, leveraging services like Lambda, ECS (Fargate), S3, and RDS.
API Design: Build robust, secure RESTful APIs that serve as the bridge between the new React frontend and the modernized backend.
CI/CD Implementation: Establish automated pipelines for building, testing, and deploying both the .NET and React components.
Technical Requirements
Backend Expertise
Legacy: Deep understanding of .NET Framework 4.8, ASP.NET MVC, and Web API.
Modern: Expert-level proficiency in .NET 6/7/8 and ASP.NET Core.
Language: Advanced C# skills (Generics, LINQ, Async/Await, Dependency Injection).
Database: Experience with SQL Server (T-SQL) and migrating to AWS-managed databases (RDS/Aurora).
Frontend Expertise
React: Strong experience with Functional Components, Hooks, and modern React patterns.
Languages: JavaScript (ES6+) and TypeScript (Required).
Tools: Experience with Vite or Webpack, and CSS frameworks (Tailwind, Material UI).
Cloud & DevOps (AWS)
Compute: Hands-on experience with AWS Lambda (Serverless) or Amazon ECS/EKS.
Infrastructure: Familiarity with Infrastructure as Code (CloudFormation, CDK, or Terraform).
Deployment: Building CI/CD pipelines (GitHub Actions).
Preferred Qualifications
Experience using the AWS Porting Assistant for .NET or AWS Transform.
Familiarity with containerization (Docker) and orchestration.
Knowledge of Authentication/Authorization standards (OAuth2, OpenID Connect, AWS Cognito).
Proven track record of successfully migrating at least one large-scale enterprise application.
Nous vous remercions de l’intérêt que vous nous portez. Seuls seront contactés les candidats
sélectionnés pour une
entrevue.
GFL Environmental est un employeur égalitaire et encourage les femmes, les Autochtones, les personnes en situation de
handicap et les membres des minorités visibles à se porter candidats. Nous souhaitons embaucher des personnes réunissant
les caractéristiques de la diversité et issues de différents horizons. Nous sommes intimement convaincus que le talent
d’envergure ne fait aucune distinction fondée sur le genre, les origines ethniques ou nationales, l’identité et
l’orientation sexuelles, l’âge, la religion ou l’invalidité, et que le talent s’enrichit grâce à ces différences. GFL
offre aux candidats en situation de handicap des mesures d’adaptation pendant tout le processus de recrutement. Si vous
avez besoin de moyens d’adaptation, veuillez nous le faire savoir et nous tâcherons de répondre à vos besoins en
collaboration avec vous.