Senior Web Application Developer

At Flynn, it's not just a job, it's a career
Flynn Group of Companies, North America’s leading building envelope contractor is looking to hire a Sr. Web Application Developer to work in our beautiful Mississauga location.
Relocation assistance provided for top qualified candidates. Candidates are expected to come to the office all 5 days.
Our Tech Stack Our primary tech stack is .NET (C#) hosted in AWS and Microsoft Azure. We use MongoDB, MySQL, and SQL Server for our databases. Apps are built in ASP.NET and Angular for our web apps.
Responsibilities
Core member of the team designing, architecting, developing, code reviewing and testing our key applications
Design new application features and integrations in collaboration with team members to deliver complex changes
Design and implement scalable and resilient cloud solutions with security and disaster recovery in mind
Help the team plan and execute technical deliverables
Ensure good code coverage and test coverage by writing and maintaining effective automated tests
Champion code quality in the team by adhering to CLEAN architecture and SOLID principles
Mentor other developers on the team in software development life cycle and best practices and elevate the skill of the team through technical mentorship
Work with BA team and stakeholders to identify business needs and develop solutions that align with their objectives
Provide off‑hours support as required
Participate in a rotating weekly on‑call schedule
What We Are Seeking
10+ years of recent experience, with at least 5 years in a Sr. Web Developer or similar senior role
Post‑secondary education in Computer Science/IT or related field
Experience in .NET / .NET Framework and C#
Experience in Entity Framework
Experience with TypeScript front‑end frameworks: Angular, React, Vue
Experience with relational databases: MySQL, SQL Server, Postgres
Experience with non‑relational databases: MongoDB, DocumentDB, DynamoDB
Experience with Docker and container‑hosting: AWS ECS, Kubernetes
General Amazon AWS knowledge (or equivalent): EC2, S3, CloudFront, Elastic Beanstalk, Dynamo DB
Basic networking knowledge and troubleshooting
Experience with any of the following tools and technologies: Atlassian Jira, GitHub, Azure DevOps, Aha!, New Relic, Sumo Logic
Familiarity with AI‑powered development tools such as GitHub Copilot, Claude Code, or similar – we embrace AI‑assisted development as part of our engineering culture
Benefits
Funded training and development program
Very well‑equipped on‑site gym with free access
Dental and supplemental medical plan
Matching RRSP contributions
Employee and Family Assistance Program
Subsidized onsite cafeteria with excellent food choices
Free parking and EV charging facility
Family events and Flynn Fest
MSDN Subscription
Enterprise AI subscription (GitHub Copilot, Claude, or similar – your choice)
$120,000 – $150,000 a year
Flynn Group of Companies is the leading trade contractor in North America that works on virtually every aspect of a building’s outer layer, including Roofing, Glazing, Waterproofing, and Architectural Metals. The foundation of our award‑winning success is having the right people on our team.
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