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Senior Developer Full Stack Canada Jobs (On-site work)

10 Job Offers

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Senior Software Developer - Full Stack
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Senior Full Stack Developer needed for a 12-month onsite contract in Toronto. You will build Java EE and Cloud-Native apps using Angular, React, Node.js, Spring Boot, and GraphQL. Key duties include developing Web Services (SOAP/ReST) and complex Oracle PL/SQL scripts. Earn a competitive daily ra...
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Canada , Toronto
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Not provided
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Randstad
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Until further notice
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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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Not provided
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Randstad
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Until further notice
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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Not provided
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Randstad
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Senior Full Stack Java Developer
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Senior Full Stack Java Developer sought in Mississauga, Canada. Leverage 5+ years of expertise in Java, React, Spring Boot, and Oracle to lead application systems analysis and programming. Design and maintain robust web applications using Microservices, REST, and GraphQL, with practical AI tool e...
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Canada , Mississauga
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94300.00 - 141500.00 USD / Year
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Citi
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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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Until further notice
Senior Software Developer - Full Stack
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Join our client's team as a Senior Full Stack Developer for a 12-month contract in North York. Leverage your expertise in React, Next.js, Node.js, and TypeScript to build accessible, cloud-native web applications. This role requires strong skills in Entity Framework, REST APIs, and WCAG/AODA comp...
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Canada , North York
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Not provided
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Randstad
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Senior Software Developer - Full Stack
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Seeking a Senior Full Stack Developer for a 12-month onsite contract in Toronto. This role requires deep expertise in Java, J2EE, JSF, and open-source frameworks like Spring and jQuery. You will design data pipelines, translate specifications into applications, and resolve technical issues. Earn ...
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Canada , Toronto
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Not provided
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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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Until further notice
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 expertise in Java EE, Spring, React, and cloud-native technologies to design and build robust applications. This role requires hands-on experience with Azure, DevOps, and Oracle databases. En...
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Canada , Toronto
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Not provided
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Randstad
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Until further notice
Senior Full Stack Developer
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Join Betstamp as a Senior Full Stack Developer in Toronto. Lead DevOps growth and own full-stack features using Go/Python and React. Enjoy autonomy, competitive salary, and a product-driven, ship-fast startup culture. Bonus for Go or sports betting domain experience.
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Canada , Toronto
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Not provided
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Betstamp
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Until further notice

About the Senior Developer Full Stack role

Senior Developer Full Stack Jobs represent the pinnacle of technical leadership and versatility in the software engineering landscape. Professionals in these roles are seasoned experts responsible for the end-to-end creation, deployment, and maintenance of complex, scalable software applications. They seamlessly bridge the gap between front-end user interfaces and back-end server logic, databases, and infrastructure. Unlike more junior positions, senior full stack developers are expected to provide architectural guidance, mentor other engineers, and drive strategic technical decisions that align with business objectives. For those seeking to lead and innovate, senior full stack developer jobs offer a challenging and rewarding career path at the heart of digital transformation.

The typical responsibilities of a Senior Full Stack Developer are comprehensive and leadership-oriented. They are tasked with designing robust system architectures, often leveraging microservices and cloud-native principles to ensure high availability and scalability. A core part of their role involves writing clean, efficient, and secure code across the entire technology stack, while establishing and enforcing best practices for coding, testing, and documentation. They lead the full software development lifecycle, from gathering requirements and solution design to deployment and ongoing optimization. Senior developers are also crucial in troubleshooting complex system issues, performing root cause analysis, and implementing sustainable fixes. Beyond coding, they actively collaborate with cross-functional teams including product managers, business analysts, and UX designers, translating business needs into technical specifications. A significant aspect of the role is mentorship, coaching mid-level and junior developers, conducting code reviews, and fostering a culture of continuous improvement and knowledge sharing within the team.

To excel in senior full stack developer jobs, a deep and broad technical skill set is mandatory. On the front-end, proficiency in modern frameworks like Angular, React, or Vue.js, coupled with core web technologies (HTML5, CSS3, JavaScript/TypeScript), is essential. The back-end demands expert-level knowledge in server-side languages such as Java (with Spring Boot), Python, Node.js, or .NET, and experience in designing and consuming RESTful APIs and GraphQL. Database mastery must include both relational (e.g., PostgreSQL, Oracle) and NoSQL (e.g., MongoDB) systems. In today's environment, familiarity with cloud platforms (AWS, Azure, GCP), containerization (Docker, Kubernetes), and CI/CD pipelines is a standard requirement. Equally important are the non-technical competencies. Senior developers must possess advanced problem-solving and analytical abilities, excellent written and verbal communication skills to articulate complex concepts to technical and non-technical stakeholders, and strong project management or team leadership capabilities. They are expected to have a proactive mindset towards application security (OWASP), performance optimization, and staying abreast of emerging technologies like AI/ML. Typically, these positions require a substantial track record, often 8+ years of hands-on development experience, with a proven history of leading successful projects from conception to delivery. For ambitious engineers, senior full stack developer jobs are a destination role that combines deep technical expertise with strategic influence and team leadership.

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