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Randstad Logo Randstad · IT - Software Development

Senior Software Developer

Canada, Toronto 554.83 - 590.41 CAD / Day · Job Posted June 02, 2026

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Job Description

We are seeking a Software Developer with a strong foundation in the Microsoft .NET stack to translate complex technical specifications into high-performance, secure applications. This role requires a balance of backend expertise (C#, .NET Core/5+) and modern web development (ASP.NET MVC/Web API). You will be an integral part of an Agile Scrum team, contributing to the full Software Development Life Cycle (SDLC) from design and coding to automated unit testing and cloud deployment.

Job Responsibility

  • Write and maintain clean, modular code using C# and ASP.NET Core
  • Ensure software reusability and extensibility through robust design patterns
  • Design and develop secure REST APIs following the OpenAPI (Swagger) specification
  • Implement token or claims-based authorization (OAuth, Windows Auth)
  • Utilize Entity Framework Core or Dapper to interact with SQL Server and other relational databases
  • Support cloud-based development using Azure and Infrastructure as Code (Terraform)
  • Manage application containerization via Docker and deployment on IIS
  • Conduct unit testing and troubleshoot technical issues
  • Integrate software monitoring, logging, and analytics platforms
  • Elicit requirements from stakeholders and produce detailed programming specifications, user manuals, and architectural diagrams

Requirements

  • 3+ years of .NET Core or .NET 5+
  • 3+ years of ASP.NET MVC and Web API
  • 3+ years of Entity Framework (or similar ORM) and SQL Server
  • Experience with asynchronous programming and event-based patterns
  • Working experience with Node.js, React, and RESTful service integration
  • Solid understanding of OOP principles and the .NET framework internals (CLR, memory management, IL)
  • Proficiency with Git for version control and Swagger for API versioning and documentation
  • Excellent analytical problem-solving skills and the ability to communicate technical designs clearly to both technical and non-technical stakeholders
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