Application Guide

How to Apply for Senior Software Engineer

at GFL Environmental

🏢 About GFL Environmental

GFL Environmental is a sustainability-focused waste management and soil remediation company driving meaningful environmental impact through technology. Unlike typical tech companies, they offer the unique opportunity to apply cutting-edge software engineering skills to solve real-world environmental challenges, making technical work directly contribute to a greener future.

About This Role

This Senior Software Engineer role leads GFL's digital transformation by modernizing legacy .NET Framework 4.8 MVC monoliths into .NET 6+ microservices and building modern React frontends on AWS. The position is impactful because you'll be architecting the core systems that enable sustainable waste management operations across North America, directly supporting their mission through technology modernization.

💡 A Day in the Life

A typical day involves collaborating with the team on modernizing specific components of legacy .NET Framework applications, designing .NET 6+ microservices architecture, implementing React components with TypeScript, and configuring AWS infrastructure. You'll balance between maintaining existing systems during transition and building new cloud-native solutions that support GFL's waste management operations.

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Interview Prep

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🎯 Who GFL Environmental Is Looking For

  • A full-stack expert with 6+ years experience who can seamlessly transition between modernizing .NET Framework 4.8 legacy code and building .NET 6+ microservices with ASP.NET Core
  • Deep practical knowledge of both legacy technologies (.NET Framework 4.8, ASP.NET MVC) AND modern stacks (.NET 6/7/8, React with TypeScript, AWS cloud services)
  • Experience designing and implementing complete modernization projects, not just maintaining existing systems or building greenfield applications
  • Proven ability to establish automated CI/CD pipelines for both .NET backend and React frontend components in cloud environments

📝 Tips for Applying to GFL Environmental

1

Explicitly highlight your experience with .NET Framework 4.8 to .NET 6+ migration projects in your resume - this is a core requirement, not just nice-to-have

2

Quantify your impact on previous modernization projects (e.g., 'Reduced API response time by 40% when migrating from MVC to .NET 6 microservices')

3

Mention specific AWS services you've used (Lambda, ECS/EKS, S3, RDS) and Infrastructure as Code tools in your technical skills section

4

Demonstrate understanding of both legacy and modern React patterns - they need someone who can work with existing code while implementing best practices

5

Research GFL's environmental initiatives and connect how your technical skills could support their sustainability mission

✉️ What to Emphasize in Your Cover Letter

['Your experience with .NET Framework 4.8 to .NET 6+ migration projects and the business impact of those modernizations', 'Specific examples of building React frontends that communicate with modernized .NET backend APIs', "How you've established automated CI/CD pipelines for both frontend and backend components in previous roles", "Why you're interested in applying software engineering skills to environmental sustainability challenges specifically"]

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🔍 Research Before Applying

To stand out, make sure you've researched:

  • → GFL's specific waste management and soil remediation services to understand what business problems their software solves
  • → Their sustainability initiatives and environmental impact reports to speak knowledgeably about their mission
  • → Recent news about GFL's digital transformation or technology investments
  • → The waste management industry's technology trends and how digitalization is changing the sector

💬 Prepare for These Interview Topics

Based on this role, you may be asked about:

1 Walk me through your approach to migrating a .NET Framework 4.8 MVC application to .NET 6+ microservices
2 How would you design the communication between a modern React frontend and newly created .NET microservices?
3 Describe your experience with AWS deployment and which specific services you've used for similar modernization projects
4 What challenges have you faced when establishing CI/CD pipelines for both .NET and React components, and how did you overcome them?
5 How do you ensure backward compatibility and smooth transition when modernizing legacy enterprise applications?
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⚠️ Common Mistakes to Avoid

  • Only highlighting greenfield development experience without demonstrating legacy system modernization skills
  • Treating this as just another software engineering role without showing interest in GFL's environmental mission
  • Being vague about your .NET Framework 4.8 experience - they need concrete examples, not just listing it as a skill

📅 Application Timeline

This position is open until filled. However, we recommend applying as soon as possible as roles at mission-driven organizations tend to fill quickly.

Typical hiring timeline:

1

Application Review

1-2 weeks

2

Initial Screening

Phone call or written assessment

3

Interviews

1-2 rounds, usually virtual

✓

Offer

Congratulations!

Ready to Apply?

Good luck with your application to GFL Environmental!

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