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Burlington, ON
Full Stack Developer
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About the role
We are looking for a forward-thinking Full Stack Developer with 5+ years of experience who is expert at leveraging AI-assisted coding tools to build high-quality software. You will be responsible for the end-to-end development of web and mobile applications, utilizing modern cloud infrastructure and high-performance databases. The ideal candidate treats AI tools (like Claude Code and Gemini) as a force multiplier for productivity and code quality.
Responsibilities
-**Full Stack Development:**Build and maintain responsive web applications using React or Angular and backend services using .NET. -**Mobile Development:**Develop and deploy cross-platform mobile features using React Native. -**AI-Enhanced Workflow:**Utilize AI coding assistants (e.g., Claude Code, Gemini, GitHub Copilot) to accelerate development, refactor legacy code, and ensure high test coverage. -**Cloud Infrastructure:**Architect and manage containerized services using AWS ECS and AWS Fargate. -**Database Management:**Design, optimize, and maintain complex relational data structures in PostgreSQL using SQL. -**Performance & Scale:**Identify bottlenecks and optimize application performance at both the UI and database levels. -**Collaboration:**Participate in Agile ceremonies and contribute to a culture of continuous learning and technical excellence.
##Requirements
-**Professional Experience:**Proven track record as a Full Stack Developer. -**Frontend/Mobile:**Expert proficiency in React or Angular; professional experience with React Native. -**Backend:**Strong experience with .NET Core / ASP.NET. -**Database:**High proficiency in SQL and PostgreSQL (schema design, indexing, and optimization). -**Cloud & DevOps:**Hands-on experience with AWS ECS and Fargate. -**Modern Tooling:**Deep familiarity with AI-assisted development workflows (e.g., using LLMs for code generation, debugging, and documentation). -**Testing:**Strong focus on automated testing (Unit, Integration, and E2E) to validate AI-assisted output. -**Version Control:**Proficiency with Git and collaborative branching strategies.
##Preferred Qualifications
-**Real-time Data:**Experience with Apache Kafka or similar message brokers for event-driven architectures. -**Architecture:**Experience transitioning monolithic applications to microservices. -**CI/CD:**Experience setting up automated pipelines for containerized deployments.
We thank you for your interest. Only those selected for an interview will be contacted.
GFL is committed to equal opportunity for all, without regard to race, religion, color, national origin, citizenship, sex, sexual orientation, gender identity, age, veteran status, disability, genetic information, or any other protected characteristic. If you are interested in applying for employment and need special assistance or an accommodation to apply for a posted position, please contact myworkdayrecruitment@gflenv.com
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About GFL Environmental
Allied Universal®, a leading security and facility services company, provides proactive security services and cutting-edge smart technology to deliver evolving, tailored solutions that allow clients to focus on their core business. Our excellence starts with our local leadership and local presence. In fact, in North America alone, we have an extensive network of offices to support our local communities and customers. We take pride in our extensive knowledge in a range of specialty sectors such as education, healthcare, retail, commercial real estate, government and corporate campuses, etc. We believe there is no greater purpose than serving and safeguarding customers, communities and people in today’s world. Allied Universal is There for you™.
Allied Universal’s Canadian operations are a hallmark of integrity, discretion, and professionalism. For over 20 years, we have provided unparalleled service, systems, and solutions to serve, secure, and care for the people and businesses throughout Canada. Our relationships with our employees and clients are at the heart of everything we do, each and every day. With a large span of regional offices, our national reach and local presence covers the nation.
Through our one-on-one collaboration, we partner with you to truly understand your security needs and goals. Through our leading services, systems, and solutions—security services, technology services, and complementary services— Allied Universal is There for you. ™ Commercial, Industrial, Retail & Law Enforcement markets have been our primary focus.
Our commitment to finding the highest quality products is never ending, whether for the Industrial Mining, Nuclear, Forestry industry, or the Retail, Commercial industries, our clients gain our knowledge of “What Works” for their respective businesses.