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Senior software developer Canada Jobs (On-site work)

23 Job Offers

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Senior Software Developer - Back End
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Senior Software Developer - Back End needed for a 12-month onsite contract in Toronto. Leverage 3+ years of expertise in .NET/C#, React, and Power BI to customize and build Dynamic CRM solutions. Key responsibilities include developing workflows, plugins, and Power Automate flows, plus managing s...
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Canada , Toronto
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Randstad
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Senior Software Developer
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Canada , Toronto
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Randstad
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Senior Software Developer
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Canada , Toronto
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546.97 - 582.68 CAD / Hour
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Randstad
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Senior Software Developer- Front End
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Canada , North York
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Randstad
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Senior Software Developer
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Canada , North York
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Randstad
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Senior Software Developer
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Canada , North York
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Randstad
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Senior Software Developer - Full Stack
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Senior Full Stack Developer sought in Toronto to architect and scale high-performance web/mobile apps using React, Next.js, and Elasticsearch. You will lead the full development lifecycle—from microservices and cloud deployment to AODA/WCAG-compliant UI/UX. Requires 5+ years React expertise, 3+ y...
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Canada , Toronto
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Randstad
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Senior Software Developer - Full Stack
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Senior Full Stack Developer needed for a 15-month onsite contract in North York. Leverage 10+ years of experience in public sector healthcare IT, including OPS methodologies and clinical system integration. You will support the m-IMMS UI, enhance system maintainability, and align with provincial ...
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Canada , North York
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Randstad
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Senior Software Developer - Full Stack
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Join our client in Toronto as a Senior Full Stack Developer for a 12-month onsite contract. Leverage your advanced skills in React.js, Python/FastAPI, and .NET Core to design and build robust applications and data pipelines. This role requires expertise in cloud architecture, CI/CD with Azure Dev...
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Canada , Toronto
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565.97 - 601.35 CAD / Hour
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Randstad
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Senior Software Developer
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Seeking a Senior Software Developer for a 5-month contract in Toronto. This role requires 8+ years of SDLC experience and expertise in Microsoft .Net Framework for B2B/B2C web applications. You will provide application support, prepare deployments, and ensure smooth testing phases. Earn a competi...
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Canada , Toronto
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546.97 - 582.68 CAD / Hour
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Randstad
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Senior Software Developer - API
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Lead the design of modern REST APIs in Toronto, integrating Dynamics 365 and Azure. Utilize your deep C#, .NET Core, and Azure expertise to build secure, scalable solutions. Translate complex specs into production-ready applications within a collaborative, onsite team.
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Canada , Toronto
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Randstad
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Senior Software Developer
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Seeking a Senior Software Developer for an 18-month onsite contract in Toronto. This role requires deep expertise in Java (Open JDK 8/11), Spring Boot, and microservices (SOAP/REST). You will build and test applications using Docker, Kubernetes, and modern DevOps/CI/CD practices. Enjoy a competit...
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Canada , Toronto
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Randstad
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Senior Software Developer - Back End
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Join our client's team as a Senior Back End Developer for a 12-month onsite contract in Toronto. Leverage your 5+ years with Java Open JDK and 3+ years in Spring Boot, SOAP/REST APIs, and cloud-native tools (Docker, Kubernetes). You will develop, test, and deploy robust applications while enjoyin...
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Canada , Toronto
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543.70 - 579.46 CAD / Hour
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Randstad
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Senior Software Developer - ETL
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Seeking a Senior ETL Developer for a 12-month onsite contract in North York. Utilize your deep expertise in Azure Data Factory, Databricks, or Informatica, along with advanced SQL/PL/SQL skills. Design data models and build robust data pipelines while working with CI/CD (DevOps). This role offers...
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Canada , North York
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555.49 - 591.05 CAD / Hour
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Randstad
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Senior Software Developer
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Seeking a Senior Software Developer for a 2-month contract in North York, Canada. This role requires deep expertise in Vlocity platform tools (FlexCards, OmniScripts, LWC) and Salesforce Community Cloud. You will design accessible web applications, ensuring AODA and ODS standards, and support ful...
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Canada , North York
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554.83 - 590.41 CAD / Hour
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Randstad
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Senior Software Developer - ETL
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Join our client in North York as a Senior ETL Developer for a 12-month contract. Design and implement high-quality data pipelines using Azure Data Factory and Databricks. Leverage your expertise in CI/CD, DevOps, and full lifecycle development. This role offers a competitive rate and extension po...
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Canada , North York
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543.70 - 579.46 CAD / Hour
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Randstad
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Senior Software Developer - ETL
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Join our client in North York as a Senior ETL Developer for a 12-month onsite contract. Leverage your extensive expertise in Azure Data Factory, Databricks, and SQL/Oracle development. Design and implement robust data pipelines while working with CI/CD DevOps practices. This role offers a competi...
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Canada , North York
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555.49 - 591.05 CAD / Hour
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Randstad
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Senior Software Developer - ETL
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Seeking a Senior ETL Developer for a 12-month onsite contract in North York. This role requires 10+ years of data warehousing expertise, specifically with Informatica PowerCenter and cloud solutions like Redshift. You will design and optimize complex ETL processes for a centralized data repositor...
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Canada , North York
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555.49 - 591.05 CAD / Hour
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Randstad
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Senior Software Developer - Full Stack
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Lead the modernization of the legacy AERO platform as a Senior Full-Stack Developer in Milton. You will refactor systems using VB.NET, C#, and Oracle PL/SQL while implementing CI/CD with Azure DevOps. This strategic role bridges legacy code and modern practices, requiring strong technical leaders...
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Canada , Milton
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Not provided
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Randstad
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Senior Staff Software Developer, Developer Infrastructure
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Canada , Toronto
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213000.00 - 250000.00 CAD / Year
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Robinhood
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About the Senior software developer role

Explore senior software developer jobs and discover a pivotal career at the intersection of deep technical expertise and strategic leadership. A senior software developer is far more than just an experienced coder; they are a cornerstone of the engineering team, responsible for designing robust systems, guiding technical direction, and mentoring less experienced colleagues. This role typically involves taking ownership of significant components or entire applications, ensuring they are scalable, maintainable, and aligned with business objectives.

Professionals in these roles generally shoulder a comprehensive set of responsibilities. They architect and implement complex software solutions, making critical decisions on technologies, frameworks, and design patterns. A key duty is writing high-quality, efficient, and secure code while establishing and enforcing coding standards and best practices across the team. They lead the full software development lifecycle, from requirement analysis and system design through to deployment, monitoring, and iterative enhancement. Collaboration is central, as they frequently liaise with product managers, business stakeholders, and other engineering teams to translate business needs into technical specifications. Furthermore, senior developers are expected to troubleshoot and debug intricate system issues, optimize application performance, and proactively advocate for process and technological improvements. Mentoring junior and mid-level developers, conducting code reviews, and contributing to a culture of continuous learning are also hallmarks of the position.

The typical skill set for senior software developer jobs is both broad and deep. Mastery of one or more core programming languages (such as Java, C#, Python, JavaScript, or Go) and their associated ecosystems is fundamental. Equally important is a strong grasp of software architecture principles, including microservices, domain-driven design, and API design (REST, GraphQL). Experience with modern development practices like Agile/Scrum, DevOps, CI/CD pipelines, and cloud platforms (AWS, Azure, GCP) is commonly required. Proficiency with database technologies, both relational and non-relational, and knowledge of containerization tools like Docker and Kubernetes are standard expectations. Beyond technical prowess, successful senior developers possess exceptional problem-solving abilities, effective communication skills for explaining complex concepts to diverse audiences, and strong project management capabilities to drive initiatives to completion. While requirements vary, most positions seek candidates with a bachelor’s degree in computer science or a related field (or equivalent experience) and a minimum of 5-8 years of progressive hands-on development experience, including demonstrable leadership in technical projects.

Ultimately, senior software developer jobs represent an opportunity to have an outsized impact on a company's technology and product trajectory. It is a career path for those who are passionate about building excellent software, leading by example, and driving innovation from within the engineering organization.

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