Senior .NET Developer Onsite Mississauga, ON (Onsite role)

Hiring: Senior .NET Developer | Mississauga, ON | 12-Month Contract

Location: Mississauga, Ontario, Canada
Duration: 12 Months
Work Arrangement: Onsite

We are looking for an experienced Senior .NET Developer with strong expertise in C#, .NET Core, React, Azure, Microservices, and SQL/PostgreSQL to join a high-performing engineering team.

Key Requirements

• 7+ years of professional software engineering experience
• Expert-level C# / .NET Framework / .NET Core
• Strong experience building REST APIs and Microservices
• Hands-on React development
• Strong Microsoft Azure experience, including App Services, Azure Service Bus, Key Vault, Container Apps, VNets, and related services
• Expert-level SQL Server and PostgreSQL
• Strong Docker/containerization experience
• Experience with CI/CD using Azure DevOps, GitHub Actions, or similar
• Strong understanding of distributed systems and scalable application architecture
• Experience with Java or Kotlin is preferred
• Hands-on experience with GitHub Copilot, Claude, Cursor, or other AI-assisted development tools

Nice to Have

• Kubernetes / Azure Container Apps
• Kafka / RabbitMQ / event-driven architecture
• Application Insights / OpenTelemetry
• TDD and pair programming
• E-commerce or transaction-heavy platform experience

Important Location Requirement

This opportunity is open ONLY to candidates currently in Canada who are legally authorized to work in Canada and can work onsite in Mississauga, Ontario.

No overseas candidates
No candidates requiring relocation from outside Canada
Remote-only candidates will not be considered