Application Guide

How to Apply for Senior Software Engineer

at GFL Environmental

🏢 About GFL Environmental

GFL Environmental is a North American leader in sustainable waste management and soil remediation, committed to environmental stewardship. Working here means contributing to a greener future while being part of a company that values innovation and digital transformation.

About This Role

As a Senior Software Engineer, you will lead the modernization of legacy .NET monoliths into scalable microservices and APIs, deploy a modern React frontend, and orchestrate AWS cloud infrastructure. This role is pivotal in driving GFL's digital transformation, directly impacting operational efficiency and environmental sustainability.

💡 A Day in the Life

A typical day might start with a stand-up meeting to discuss progress on migrating a legacy module, then diving into coding: refactoring a .NET controller into a microservice, writing TypeScript components with Redux Toolkit, and deploying updates via CI/CD pipeline. Afternoons could involve code reviews, collaborating with product teams on requirements, and monitoring AWS infrastructure performance.

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Interview Prep

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🎯 Who GFL Environmental Is Looking For

  • Has 6+ years of full-stack experience with deep expertise in .NET Framework 4.8 and .NET 6/7/8, specifically modernizing legacy systems.
  • Strong proficiency in React, TypeScript, Redux Toolkit, and TanStack Query for building robust frontends.
  • Hands-on experience with AWS services (Lambda, ECS, S3, RDS) and Infrastructure as Code (CloudFormation, CDK, or Terraform).
  • Proven track record of migrating large-scale enterprise applications, with a focus on performance and reliability.

📝 Tips for Applying to GFL Environmental

1

Highlight specific examples of modernizing .NET Framework monoliths to .NET 6+ microservices, including challenges and outcomes.

2

Showcase your React/TypeScript projects with state management (Redux Toolkit, TanStack Query) and how they improved user experience.

3

Detail your AWS experience with specific services (Lambda, ECS, RDS) and Infrastructure as Code tools (CDK preferred).

4

Mention any experience with CI/CD pipelines (e.g., GitHub Actions, AWS CodePipeline) and how you ensured smooth deployments.

5

Tailor your resume to include keywords from the job description: 'legacy modernization', 'microservices', 'React', 'TypeScript', 'AWS'.

✉️ What to Emphasize in Your Cover Letter

['Emphasize your passion for environmental sustainability and how your technical skills can help GFL achieve its green mission.', 'Highlight your expertise in modernizing legacy .NET applications and migrating to cloud-native architectures.', 'Showcase your ability to lead digital transformation initiatives and collaborate with cross-functional teams.', "Mention specific AWS services you've used and how they improved scalability or cost efficiency."]

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🔍 Research Before Applying

To stand out, make sure you've researched:

  • → Research GFL's sustainability initiatives and recent news about their digital transformation efforts.
  • → Understand GFL's core business processes (waste management, soil remediation) to align your technical solutions.
  • → Familiarize yourself with GFL's tech stack (if publicly available) and any open-source contributions.
  • → Look into GFL's company culture, values, and employee reviews on Glassdoor to gauge fit.

💬 Prepare for These Interview Topics

Based on this role, you may be asked about:

1 Walk me through a time you modernized a legacy .NET monolith. What challenges did you face and how did you overcome them?
2 How would you design a microservice architecture for GFL's core enterprise applications?
3 Describe your experience with React state management. Why would you choose Redux Toolkit vs. TanStack Query?
4 Explain how you would set up CI/CD pipelines on AWS for a .NET application.
5 How do you ensure security and compliance when migrating enterprise applications to the cloud?
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⚠️ Common Mistakes to Avoid

  • Don't focus solely on frontend or backend; emphasize full-stack capabilities with both .NET and React.
  • Avoid vague descriptions of AWS experience; be specific about services and Infrastructure as Code tools used.
  • Don't neglect the environmental aspect; show genuine interest in GFL's mission, not just the tech.

📅 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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