Senior.NET Developer

Assignment: RQ11489 - Software Developer - Intermediate

Job Title: Senior .NET Developer

Requisition (SS): RQ11489

Start Date: 2026-09-21

Client: Government Services Integration Cluster

End Date: 2027-03-31

Office Location: 222 Jarvis Street, Toronto

Organization: Government Services Integration Cluster

Ministry: Ministry of Public and Business Service Delivery and Procurement

# Business Days: 135.00

5 days onsite

Must Have:

• 3 5 years of experience as a designer and developer building large-scale, multi-client web applications and backend services.
• 3 5 years of hands-on working experience in C# and .NET (.NET Core / .NET 6+) development paired with relational databases (SQL Server).
• 3+ years of dedicated hands-on experience designing, developing, securing, and integrating RESTful Web APIs (ASP.NET Core Web API).
• Demonstrated experience with microservices architecture, API authentication protocols (OAuth2, JWT), and database ORMs (Entity Framework Core / Dapper).
• 2+ years of hands-on experience using Azure DevOps for work item management, code repositories, and CI/CD deployment pipelines.

Nice to have:

• OPS or public experience

Description

Responsibilities

• Translate technical systems specifications into working, tested applications and APIs.
• Design, build, and maintain efficient, high-performing RESTful Web APIs using C# and .NET Core / .NET 6+.
• Write clean, maintainable code, develop detailed programming specifications, and execute thorough unit/integration testing.
• Integrate Web APIs with relational databases (SQL Server) using ORMs like Entity Framework Core or Dapper.
• Resolve and troubleshoot technical issues throughout the software lifecycle, providing technical assistance during implementation, conversion, and migration phases.
• Implement API security standards, including authentication, authorization, and secure data transfer protocols.

General Skills

• Hands-on experience with HTTP/HTTPS communications protocols, REST standards, and API routing/versioning.
• Experience in programming and analysis; specialized software package support at the specified experience level
• Ability to collaborate with IT Professionals throughout the Software Development Life Cycle
• Experience in structured methodologies for the development, design, implementation and maintenance of applications
• Experience in design, code, test, debug and document applications
• Experience in the use of object and/or third generation language development tools
• Experience in one or more programming languages
• Experience in application design, latest design patters, deployment and troubleshooting
• Experience with relational and hierarchical database technologies
• Experience in the use of information retrieval packages using query languages
• Experience with one or more communications protocols
• Experience in structured methodologies for the design, development, implementation and maintenance of applications
• Experience eliciting and documenting information from diverse business area stakeholders and subject matter experts
• Excellent analytical, problem-solving and decision-making skills; verbal and written communication skills; interpersonal and negotiation skills
• A team player with a track record for meeting deadlines

Desirable Skills

• Experience building and deploying cloud-native web services and APIs in Microsoft Azure (e.g., Azure App Services, Azure Functions, API Management).
• Familiarity with API gateway solutions, middleware integration, and message queues (e.g., RabbitMQ, Azure Service Bus).
• Hands-on experience with automated CI/CD build and deployment pipelines in Azure DevOps.
• Experience reviewing, analyzing, and modifying product installation and deployment scripts.
• Ability to conduct design walkthrough sessions with project teams and provide clear user/system documentation.
• Knowledge of Accessibility for Ontarians with Disabilities Act (AODA) standards and policies for web applications.

Experience and Skill Set Requirements

Core Skills & Experience (40%)

• 5+ years of experience as a software developer designing and building scalable web applications and microservices using C# and .NET (.NET Core / .NET 6+).
• 5+ years of hands-on experience specifically designing, developing, securing, and documenting RESTful Web APIs.
• 5+ years of working experience with relational databases (Microsoft SQL Server) and Entity Framework Core / Dapper.
• Practical understanding of microservice architecture and core design principles to maximize system extensibility and maintainability.
• Hands-on experience using Azure DevOps for work item tracking, code repositories, and CI/CD pipelines.

Technical Skills & Experience (35%)

• In-depth knowledge of API security protocols and authentication mechanisms (JWT, OAuth 2.0, OpenID Connect, SSL/TLS certificates).
• Solid understanding of Object-Oriented Programming (OOP), SOLID principles, design patterns, refactoring, and clean code principles.
• Experience with API testing and documentation tools (e.g., Swagger/OpenAPI, Postman, xUnit/NUnit).
• Strong working knowledge of relational database design, query optimization, indexing, and stored procedures.
• Solid understanding of Agile/Scrum methodologies and iterative development.

Soft Skills- 20%

• Strong communication skills; both written and verbal
• Ability to develop and present new ideas and conceptualize new approaches and solutions
• Excellent interpersonal relations and demonstrated ability to work with others effectively in teams
• Demonstrated ability to work with functional and technical teams Demonstrated ability to participate in a large team and work closely with other individual team members
• Proven analytical skills and systematic problem solving
• Strong ability to work under pressure, work with aggressive timelines, and be adaptive to change
• Displays problem-solving and analytical skills, using them to resolve technical problems

Public sector Experience- 5%

• OPS Development standard/Process