.Net Application Developer

6-month contract, hybrid, downtown Toronto

We are working with a client seeking a .Net Application Developer with strong legacy application development and maintenance experience. The ideal candidate will have expertise in designing, developing, maintaining, and modernizing enterprise-grade applications within the .NET ecosystem.

Key Responsibilities

- Develop, maintain, and troubleshoot legacy .NET applications, including Windows Forms desktop applications
- Analyse existing codebases and application architecture to understand business logic, workflows, dependencies, and system integrations
- Design and enhance application components using C#, .NET, Entity Framework, ADO.NET, and SQL Server
- Work with multithreading, asynchronous programming, data binding, reflection, and Windows UI components
- Integrate applications with Windows Services, hardware peripherals, printers, serial devices, COM components, and external systems
- Develop and maintain APIs, database integrations, and data-persistence solutions
- Support application deployments, cloud infrastructure, and CI/CD pipelines using AWS and Azure DevOps




- Apply software design principles, including Domain-Driven Design (DDD) and CQRS, to improve application maintainability and performance

Required Experience

- Solid hands-on experience with C# and .NET application development, particularly legacy applications
- Extensive experience with Windows Forms and desktop application development
- Strong knowledge of SQL Server, Entity Framework, ADO.NET, and database integration
- Experience with multithreading, asynchronous programming, data binding, and application performance tuning
- Experience with Windows Services, COM Interop, P/Invoke, and hardware/peripheral integration
- Experience developing APIs and integrating applications with external systems
- Familiarity with AWS, Azure DevOps, CI/CD pipelines, and deployment processes
- Strong troubleshooting, analytical, and problem-solving skills
- Retail banking or financial services experience is an asset

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📌 .Net Application Developer (Toronto)
🏢 ISG Search
📍 Toronto