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Sr. .NET Developer with Azure PaaS experience

1 month ago

Ontario ON, Canada FUSTIS LLC Full time

Role: Sr. Net Developer (3 Open Roles)Duration: 1/12/26 - 5/29/26Location: Onsite 1 day - Ontario, Canada Rate: $40 - 50 CAD per hour on C2CDescriptionSr. .NET DeveloperProven expertise building production-grade back-end services using .NET 8/9, with focus on scalability and performance optimizationAdvanced C# proficiency, including modern language features and deep understanding of asynchronous programming patterns (async/await)Expertise in C# memory management, including Span, Memory, ref structsExpertise in C# records, pattern matching, and immutable data structures to implement clean and expressive codeExpertise in C# dependency injection patternsExpertise in building reusable C# libraries, NuGet package development, and managing semantic versioningComprehensive knowledge of .NET application lifecycle, including middleware pipelines, hosting models, and environment-specific configuration strategiesStrong testing discipline using xUnit, mocking frameworks (e.g., Moq), and testable architecture principlesExpertise in implementing secure REST APIs, including OAuth 2.0, JWT, and token lifecycle managementExpertise in API versioning strategies, such as URL versioning, header-based versioning, and backward-compatible designExpertise in applying API observability, including structured logging, distributed tracing, and metrics instrumentationExperience integrating Minimal APIs with OpenAPI/Swagger, including endpoint metadata, tags, grouping, and custom schema generationHands-on experience containerizing .NET applications with Docker for development, testing, and deployment scenariosHands-on expertise with Dev Containers (VS Code Development Containers), including custom .devcontainer.json configurations and integrated debugging workflowsSkilled in authoring and optimizing Dockerfiles, including multi-stage builds and layer caching strategiesProficient with Visual Studio Code as primary IDE, including debugging containerized .NET applications using extensions and toolingAzure PaaS Development ExpertiseExperience developing and deploying microservices using Azure containerization / serverless platforms, including one or more of: Azure Kubernetes Service (AKS), Azure Container Apps(ACA), or Azure Functions running in containerized environments• Experience applying observability and diagnostics leveraging Azure Monitor, Application Insights, and Log AnalyticsNice To HaveExpertise in error handling strategies, resiliency patterns, and performance tuningExpertise in secure C# coding practices, including input validation, encryption, hashing, and secretsmanagementExpertise in modern C# coding styles, including file-scoped namespaces, global using directives,and top-level programs