senior software developer.

We are seeking an accomplished Senior Software Developer to lead the technical design, development, and maintenance of enterprise-grade cloud applications and microservices. In this role, you will translate complex system specifications into clean, scalable, and fully tested software solutions. Operating across the Microsoft tech stack and cloud ecosystems, you will design custom Web APIs, build resilient backend services, manage automated CI/CD pipelines, and resolve complex technical challenges within an Agile delivery model.

Location: Toronto, ON (Fully Onsite – 5 days/week required)

Duration: 12-month contract.

Advantages
Modern Enterprise Stack: Architect solutions using .NET Core, C#, Azure SQL, REST/OpenAPI, and OAuth2.

Full-Lifecycle Cloud Impact: Hands-on ownership across cloud service models (IaaS, PaaS, SaaS) and automated CI/CD pipelines.

End-to-End SDLC Engagement: Drive initiatives from initial specification design to cloud deployment and ongoing optimization.

Structured Onsite Synergy: Collaborate directly with senior engineering teams in a predictable, 5-day onsite workspace.

Responsibilities

Translate detailed technical system specifications into working, fully tested applications, including writing clean code and developing programming specifications.

Architect, develop, and maintain custom Web APIs, web applications, and web services using ASP.NET, .NET Core, C#, Entity Framework, and Azure SQL.

Design and implement secure RESTful services incorporating modern API standards and authentication protocols (REST, OpenAPI, OAuth2).

Establish, manage, and optimize automated CI/CD pipelines and DevOps workflows for continuous integration and deployment.

Troubleshoot, debug, and resolve complex technical software problems during system deployment, data conversion, and application migrations.

Collaborate closely with cross-functional IT professionals throughout the entire Software Development Life Cycle (SDLC).

Maintain, compile, and execute thorough unit tests to guarantee high code quality, application reliability, and performance.

Produce detailed technical documentation, architectural walkthroughs, and status reports for team members and project stakeholders.

Qualifications
Core Application Development: Proven senior-level experience developing enterprise web applications and custom Web APIs using ASP.NET, .NET Core, C#, and JavaScript (Strictly Required).

Cloud Platform Proficiency: Demonstrated working knowledge of Azure cloud technologies and proficiency across SaaS, PaaS, and IaaS service models (Strictly Required).

Database & ORM Mastery: Hands-on experience with Entity Framework and Azure SQL database design and query performance (Strictly Required).

CI/CD & DevOps Management: Hands-on experience building, managing, and maintaining automated CI/CD pipelines and DevOps task boards (Strictly Required).

API Standards & Security: Direct experience developing web services and APIs using REST, OpenAPI specifications, and OAuth2 security protocols (Strictly Required).

Agile Frameworks: Experience operating within Agile development environments, actively using Kanban and task boards (Strictly Required).

Summary
If you're interested in the "Senior Software Developer" role based in Toronto, we encourage you to apply online at
Only qualified candidates will be contacted for the next steps. We look forward to hearing from you!

Randstad Canada is committed to fostering a workforce reflective of all peoples of Canada. As a result, we are committed to developing and implementing strategies to increase the equity, diversity and inclusion within the workplace by examining our internal policies, practices, and systems throughout the entire lifecycle of our workforce, including its recruitment, retention and advancement for all employees. In addition to our deep commitment to respecting human rights, we are dedicated to positive actions to affect change to ensure everyone has full participation in the workforce free from any barriers, systemic or otherwise, especially equity-seeking groups who are usually underrepresented in Canada's workforce, including those who identify as women or non-binary/gender non-conforming; Indigenous or Aboriginal Peoples; persons with disabilities (visible or invisible) and; members of visible minorities, racialized groups and the LGBTQ2+ community.

Randstad Canada is committed to creating and maintaining an inclusive and accessible workplace for all its candidates and employees by supporting their accessibility and accommodation needs throughout the employment lifecycle. We ask that all job applications please identify any accommodation requirements by sending an email to View email address on randstad.com to ensure their ability to fully participate in the interview process.

This posting is for existing and upcoming vacancies. show more