Jobs in Canada

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Added 3 months ago
B
AI Scientist & Engineer, Assurance Innovation Lab
BDO
London, ON · Toronto, ON · Ottawa, ON · Oakville, ON · Kitchener, ON · Markham, ON · Vancouver, BC
- $110,000 to $160,000 CAD / year
- Full-time
…Architects, AI Studio Leads, ML Engineers, Data Scientists, Full Stack Developers, and citizen developers on firm-wide strategic…
Added 4 months ago
PS
Senior Developer, Private Markets Solutions Delivery
Public Sector Pension Investment Board
Montreal, QC
- Full-time
Develop full stack web applications and interfaces in support of business needs
Added 5 months ago
C
Applied AI Engineer
Cryptio
Remote, Canada
- Full-time
- Remote
…Intelligence Product Engineer and the VP of Advisory Intelligence on net-new product. You'll have full-stack ownership from Postgres schema to React UI, and you'll collaborate directly with…
Added 4 months ago
CG
Full Stack Software Developer
ConeTec Group
Burnaby, BC
- Full-time
Must possess strong work ethic and represent the company in a professional manner
Added 2 months ago
BS
Sr. Full Stack Engineer - .Net
B3 Systems
Toronto, ON
- Full-time
…and leverage AI to dramatically enhance performance. As a Sr. Full Stack Engineer, you'll work closely with both technical and non-technical teams to understand customer challenges and…
Added 6 months ago
T
.NET Full Stack Developer - Toronto
Trisura
Toronto, Ontario
- Full-time
Must have experience within Surety Insurance
Added 2 months ago
.NET Full Stack Developer (Angular)
Capgemini
Mississauga, ON
We are seeking a talented and motivated .NET Full Stack Developer with strong expertise in Angular and Microsoft .NET technologies to join our development team. The ideal candidate will be…
Added 2 months ago
AI
Full Stack Developer
Avant Imaging & Information Management, Inc.
Toronto, ON · Scarborough, ON
- Full-time
Reporting to the VP, Solutions & Delivery, we are looking for a talented and motivated Full Stack Developer – .NET to join our development team. The ideal candidate will have strong…
Added 2 months ago
Director, CX Business Systems
Braze
Toronto, ON
…team, and define the strategic roadmap for our CX technology stack. This is a critical and visible leadership role for an experienced and visionary professional who can combine a deep…
Added 4 months ago
C
Full Stack Software Developer (.NET & React)
Calliere
Toronto, Ontario
- Full-time
Designing and implementing backend services and web applications on a modern Microsoft stack (C#, .NET, ASP.NET MVC, Azure, SQL Server).
Added 5 months ago
E
Développeur(se) back-end senior / Senior back-end developer
Explorance
Montreal, Quebec
- Full-time
…poursuivons notre croissance, nous recherchons un Développeur Full-Stack talentueux et motivé pour nous aider à façonner l’avenir de notre…
Added 2 months ago
IG
Senior Software Engineer
Insight Global
Toronto, ON
- $160,000 to $190,000 CAD / year
- Full-time
Insight Global is looking for a Product Engineer to join a growing HR technology company in a full time permanent position. This role is a net new headcount to support company growth and is…
Added 2 months ago
T
Director of Software Engineering
TechBlocks
Toronto, ON · Greater Toronto Area, Canada
- $150,000 to $220,000 CAD / year
- Full-time
This is a full-time position for Head of Engineering specializing in the latest web, mobile and cloud
Added 4 months ago
Software Dev Engineer II, Oracle Database@AWS
Amazon
Vancouver, British Columbia
Be part of a high-impact team building a net-new AWS service from the ground up
Added 3 months ago
S
Senior Software Developer
SOTI
Mississauga, ON
- Full-time
…continuously improving the products we build. We are looking for a Full Stack Software Developer to contribute to the development of our flagship product, MobiControl, while also supporting…
Added 2 months ago
Account Executive - Greenfield - Toronto
CoreWeave
Toronto, ON
This is a pure hunter role. You will own net-new logo acquisition across a greenfield Enterprise territory (5,000+ employee organizations), selling the full CoreWeave platform - GPU cloud…
Added 5 months ago
ENGINEER IV - HYBRID
Green Shield Canada
Toronto, Ontario
Proven Experience: Demonstrated ability in building, shipping, and maintaining backend or full-stack web applications. We typically see this level of skill in engineers with 5+ years of…
Added 2 months ago
Client Solutions Associate
Orennia
Calgary, AB
As the world decarbonizes its energy stack, trillions in capital need to be deployed. Global investment in the energy transition must quadruple to over $5 trillion annually to stay on the…
Added 5 months ago
GE
Senior Software Engineer
GFL Environmental Inc.
Vaughan, Ontario
- Full-time
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…
Added 5 months ago
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Full Stack Developer, Tax Transformation Office
BDO
Toronto, Ontario
- Full-time
We are seeking an exceptionally skilled Full Stack Developer to join the Tax R&D Lab within the Tax Transformation Office and help build the next generation of intelligent platforms,…
Added 2 months ago
IF
Senior Full-Stack Software Developer (Python/React)
Intact FC
Toronto, ON · Montreal, QC
- Full-time
We’re looking for a Senior Full-Stack Software Developer (Python/React) to join our growing AI Engineering team and build reliable, scalable AI-powered products across distributed systems,…
Added 6 months ago
B
Full Stack Developer
Borrowell
Remote, Canada
- $80,000 to $130,000 CAD / year
- Full-time
- Remote
As a Full Stack Developer on Borrowell’s Engineering team, you will design, develop, optimize, test, and maintain application code for our in-house web and mobile products. You will ensure…
Added 6 months ago
HM
Senior Backend Engineer (.NET & AI/ML)
HW Management Inc
Vancouver, British Columbia · Toronto, Ontario · Alberta
- $110,000 to $130,000 CAD / year
- Full-time
Experience building MCP servers, AI agents, or internal AI developer tools.
Added 6 months ago
S
Senior Software Developer
SOTI
Mississauga, Ontario
- Full-time
7-10 years of enterprise software development experience with proficiency in full-stack development
Added 5 months ago
IF
Senior Full stack AI Developer (Python & Angular/React)
Intact FC
Montreal, Quebec
- Full-time
We’re looking for a Senior Full stack AI Developer (Python & Angular/React) to join our growing team!

GFL Environmental Inc.

Senior Software Engineer

Vaughan, ON, Canada

Full-time

Apply on gflenv.wd3.myworkdayjobs.com About employer

Applications open in a new tab.

Job details

Job type: Full-time
Posting language: English
Posted: Jun 9, 2026

Original job description

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.

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

Please note that GFL does not provide visa sponsorship for this position. Valid work authorization in the country where the job is located is required. Successful candidates will be required to provide valid documentation confirming their eligibility to work in the country where the job is located prior to their start date.

This hiring process may utilize machine-based systems to assist in screening and assessing applicants. Final selection decisions are made by our recruitment team.

Apply on gflenv.wd3.myworkdayjobs.com About employer

More about this job

Responsibilities

Lead the digital transformation of legacy .NET Framework 4.8 MVC monoliths into modern .NET 6+ microservices and APIs. Develop a decoupled React SPA frontend and orchestrate the entire stack on AWS infrastructure.

Requirements

Requires 6+ years of experience with expert-level proficiency in C#, .NET Core, and modern React patterns. Must have hands-on experience with AWS services and the ability to migrate enterprise-scale legacy applications.

Skills

C#
.NET 6/8
React
TypeScript
AWS
Microservices
SQL Server
RESTful APIs
CI/CD
ASP.NET MVC
Redux Toolkit
TanStack Query

Visa sponsorship

Not detected in the job text

Keywords

.NET Framework 4.8
.NET 6
.NET 8
ASP.NET Core
C#
React
TypeScript
AWS Lambda
Amazon ECS
Amazon EKS
S3
RDS
Aurora
SQL Server
T-SQL
Microservices
Hexagonal Architecture
Clean Architecture
REST API
GitHub Actions
Docker
OAuth2
OpenID Connect
AWS Cognito
Vite
Webpack
Tailwind
Material UI
Redux Toolkit
TanStack Query

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Work requirements

Jobs in Canada