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

7 Job Offers

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Senior Java Full Stack Developer
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Canada , Mississauga
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94300.00 - 141500.00 USD / Year
https://www.citi.com/ Logo
Citi
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Until further notice
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
https://www.randstad.com Logo
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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Until further notice
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
https://www.citi.com/ Logo
Citi
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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 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
https://www.randstad.com Logo
Randstad
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Until further notice
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
https://www.randstad.com Logo
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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Betstamp
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Until further notice

About the Senior Full stack Developer role

Explore the pinnacle of software engineering careers with Senior Full Stack Developer jobs. This senior-level role represents a critical and highly sought-after position within the technology landscape, blending deep technical expertise with strategic leadership. A Senior Full Stack Developer is a versatile architect of digital solutions, proficient in both front-end and back-end technologies, responsible for building, deploying, and maintaining complex, scalable, and secure enterprise-grade applications. These professionals are the cornerstone of modern development teams, translating business requirements into robust technical realities across the entire software development lifecycle.

The core responsibility of a Senior Full Stack Developer is end-to-end ownership of application systems. This involves designing system architecture, writing high-quality, maintainable code, and integrating various software components and third-party services. They lead the development of user interfaces using frameworks like Angular or React, while simultaneously engineering powerful server-side logic, APIs, and microservices with technologies such as Java Spring Boot or Node.js. Beyond coding, they ensure application performance, quality, and responsiveness. A significant part of the role involves mentoring mid-level and junior developers, conducting code reviews, and establishing best practices for coding, testing, and security. They are key collaborators, working closely with product managers, business analysts, UX/UI designers, and infrastructure teams to align technical execution with business goals.

Typical day-to-day duties include analyzing and refining functional requirements, troubleshooting and debugging complex issues, and optimizing applications for maximum speed and scalability. They implement rigorous testing protocols, including unit and integration tests, and champion CI/CD pipelines for automated deployment. Senior Full Stack Developers are also guardians of software security, proactively addressing vulnerabilities and ensuring compliance with industry standards like OWASP. They often participate in or lead Agile ceremonies, manage technical debt, and stay abreast of emerging technologies, such as cloud-native development, containerization with Docker/Kubernetes, and generative AI tools, to drive innovation and efficiency.

The skill set for these senior roles is comprehensive. On the technical front, proficiency in both front-end (JavaScript, TypeScript, HTML/CSS) and back-end (Java, .NET, Python, etc.) languages is essential, coupled with expertise in relevant frameworks, relational and NoSQL databases, and version control systems like Git. Equally important are the leadership and soft skills: excellent problem-solving and analytical abilities, clear communication for both technical and non-technical audiences, project management, and a strong sense of ownership and risk awareness. Most positions require a bachelor's degree in computer science or a related field and a substantial track record of professional experience, typically 8-15 years, demonstrating progressive responsibility and successful project delivery. For those seeking to lead from the front lines of technology, Senior Full Stack Developer jobs offer a challenging and rewarding path to shape the digital future.

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