Sr. Net Developer

Sr. Developer is responsible for reviewing code, low level design architecture and acting as a sounding board to the development team

• .Net development - building a backend application for Ontario Health (front end in React with another team)
• API Management
• Azure Container Services

REQUIRED

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

Containerization & Developer Tooling

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