At Flynn, it's not just a job, it's a careerFlynn 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.ResponsibilitiesCore member of the team designing, architecting, developing, code reviewing and testing our key applicationsDesign new application features and integrations in collaboration with team members to deliver complex changesDesign and implement scalable and resilient cloud solutions with security and disaster recovery in mindHelp the team plan and execute technical deliverablesEnsure valuable code coverage and test coverage by writing and maintaining effective automated testsChampion code quality in the team by adhering to CLEAN architecture and SOLID principlesMentor other developers on the team in software development life cycle and best practices and elevate the skill of the team through technical mentorshipWork with BA team and stakeholders to identify business needs and develop solutions that align with their objectivesProvide off‑hours support as requiredParticipate in a rotating weekly on‑call scheduleWhat We Are Seeking10+ years of recent experience, with at least 5 years in a Sr.



Web Developer or similar senior rolePost‑secondary education in Computer Science/IT or related fieldExperience in .NET / .NET Framework and C#Experience in Entity FrameworkExperience with TypeScript front‑end frameworks: Angular, React, VueExperience with relational databases: MySQL, SQL Server, PostgresExperience with non‑relational databases: MongoDB, DocumentDB, DynamoDBExperience with Docker and container‑hosting: AWS ECS, KubernetesGeneral Amazon AWS knowledge (or equivalent): EC2, S3, CloudFront, Elastic Beanstalk, Dynamo DBBasic networking knowledge and troubleshootingExperience with any of the following tools and technologies: Atlassian Jira, GitHub, Azure DevOps, Aha!, New Relic, Sumo LogicFamiliarity with AI‑powered development tools such as GitHub Copilot, Claude Code, or similar – we embrace AI‑assisted development as part of our engineering cultureBenefitsFunded training and development programVery well‑equipped on‑site gym with free accessDental and supplemental medical planMatching RRSP contributionsEmployee and Family Assistance ProgramSubsidized onsite cafeteria with excellent food choicesFree parking and EV charging facilityFamily events and Flynn FestMSDN SubscriptionEnterprise AI subscription (GitHub Copilot, Claude, or similar – your choice)$120,000 – $150,000 a yearFlynn 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.#J-18808-Ljbffr

📌 Senior Web Application Developer - C$120,000 - C$150,000 A Year (Mississauga)
🏢 Flynn Group of Companies
📍 Mississauga