Senior Dotnet Developer in Mississauga

• Duration: 12 Months
• Contract role

Responsibilities

• Design, and deliver highly scalable, fault-tolerant services and features across our microservices platform.
• Take end-to-end technical ownership — from requirements through deployment, monitoring, and production support.
• Lead technical design discussions and contribute meaningfully to architecture decisions, technology choices, and engineering standards.
• Proactively identify and address technical debt — refactor and improve maintainability, performance, and reliability of the codebase.
• Troubleshoot and resolve complex production issues with urgency and structured problem-solving.
• Collaborate with Product, QA, and stakeholders to clarify requirements, surface risks early, and drive solutions to completion with minimal supervision.
• Champion engineering best practices — testing, CI/CD, security, observability, and documentation.
• Leverage AI developer tools (e. g., Git Hub Copilot, Claude, Cursor) effectively to accelerate development and improve engineering output.
• Perform other duties as assigned.

Required Qualifications

• 7+ years of professional software engineering experience in a multi-team, production environment.
• .

NET Framework / .

NET Core / C# – expert-level experience designing and building APIs, microservices, and back-end systems; strong grasp of design patterns and SOLID principles.

• React – Experience building scalable, maintainable front-end applications; strong understanding of state management, performance optimization, and component architecture.
• Good grasp of JVM-based language fundamentals (Java or Kotlin); able to read, reason about, and contribute to codebases beyond the primary stack when the need arises.
• Microsoft Azure – solid working knowledge of Azure services with hands‑on experience across one or more of the following: Azure Container Apps (ACA), App Services (Web Apps), Azure Service Bus, Managed Postgre SQL, Key Vault, Application Gateway, Virtual Networks (VNet) & Subnets, Private Endpoints, and Private DNS Zones; experience deploying and operating production workloads in Azure.
• Databases (SQL Server & Postgre SQL) – expert‑level experience with relational database design, complex query optimization, indexing strategies, and performance tuning.
• RESTful API design – proven ability to design, build, version, and secure APIs at scale.
• Strong understanding of microservices architecture, distributed systems, and integration patterns.
• Containers (Docker) – strong hands‑on experience; comfortable with containerized application design, networking, and deployment.
• Experience with CI/CD pipelines (Azure Dev Ops, Git Hub Actions, or equivalent).
• Solid understanding of Agile / Scrum practices and the full software development lifecycle.
• Demonstrated and effective use of AI-assisted development tools as part of everyday engineering workflow.
• Nice‑to-Have Skills
• Experience with Kubernetes or Azure Container Apps for container orchestration.
• Familiarity with event‑driven architecture and message brokers (e. g., Azure Service Bus, Rabbit MQ, Kafka).
• Experience with observability tooling — logging, metrics, and distributed tracing (e. g., Application Insights, Open Telemetry).
• Background in e-commerce, marketplace, or transaction‑heavy platform environments.
• Experience with Test‑Driven Development (TDD) and pair programming practices.
• Ability to learn and adapt to newer patterns and technologies as the landscape evolves.
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