Sr. .NET Developer with Azure PaaS experience

4 weeks ago

Ottawa, Canada FUSTIS LLC Full time

Role: Sr. Net Developer (3 Open Roles)

Duration: 1/12/26 – 5/29/26

Location: Onsite 1 day – Ontario, Canada

Rate: $40 – 50 CAD per hour on C2C

Description

Sr. .NET Developer

- Proven expertise building production-grade back-end services using .NET 8/9, with focus on scalability and performance optimization
- Advanced C# proficiency, including modern language features and deep understanding of asynchronous programming patterns (async/await)
- Expertise in C# memory management, including Span, Memory, ref structs
- Expertise in C# records, pattern matching, and immutable data structures to implement clean and expressive code
- Expertise in C# dependency injection patterns
- Expertise in building reusable C# libraries, NuGet package development, and managing semantic versioning
- Comprehensive knowledge of .NET application lifecycle, including middleware pipelines, hosting models, and environment-specific configuration strategies
- Strong testing discipline using xUnit, mocking frameworks (e.g., Moq), and testable architecture principles
- Expertise in implementing secure REST APIs, including OAuth 2.0, JWT, and token lifecycle management
- Expertise in API versioning strategies, such as URL versioning, header-based versioning, and backward-compatible design
- Expertise in applying API observability, including structured logging, distributed tracing, and metrics instrumentation
- Experience integrating Minimal APIs with OpenAPI/Swagger, including endpoint metadata, tags, grouping, and custom schema generation
- Hands-on experience containerizing .NET applications with Docker for development, testing, and deployment scenarios
- Hands-on expertise with Dev Containers (VS Code Development Containers), including custom .devcontainer.json configurations and integrated debugging workflows
- Skilled in authoring and optimizing Dockerfiles, including multi-stage builds and layer caching strategies
- Proficient with Visual Studio Code as primary IDE, including debugging containerized .NET applications using extensions and tooling

Azure PaaS Development Expertise

- Experience 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 Analytics

Nice To Have

- Expertise in error handling strategies, resiliency patterns, and performance tuning
- Expertise in secure C# coding practices, including input validation, encryption, hashing, and secrets
- management
- Expertise in modern C# coding styles, including file-scoped namespaces, global using directives,
- and top-level programs

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