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Senior Developer Full Stack Canada Jobs

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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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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 Full Stack Developer
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Join Citi in Mississauga as a Senior Full Stack Developer. You will build scalable microservices and React-based front-ends for a global client platform. This role requires 5-8 years of Java/Spring and ReactJS expertise. Shape the future of a large-scale, modern technology stack.
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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 Full Stack Developer
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Lead complex web application projects as a Senior Full Stack Developer at Netsweeper in Waterloo. Utilize 10+ years of experience with React, Node.js, and microservices to design scalable solutions and mentor junior developers. Enjoy a competitive package, flexible remote options, and work on cut...
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Canada , Waterloo
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100000.00 - 140000.00 CAD / Year
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EdTech Jobs
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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 Java React Full Stack Developer
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Join Citi in Mississauga as a Senior Java React Full Stack Developer. Leverage 6+ years of experience with Java Spring Boot microservices and React.js/TypeScript frontends. Design scalable APIs and deploy on AWS/OpenShift, with a focus on innovative AI and LLM integration.
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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 Application Full Stack Developer
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Seeking a Senior Full Stack Developer in Mississauga to lead high-volume, low-latency Java applications for Capital Markets. This role requires 5+ years in Java, Angular, and Oracle RDBMS, with Weblogic EJB expertise. You will design, develop, and provide L3 support for critical inventory managem...
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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'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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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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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 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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Senior Software Developer - Full Stack
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Lead the development of business-critical enterprise applications as a Senior Full Stack Developer in Toronto. This role demands deep expertise in JSF, J2EE, Spring, and Oracle SQL to design robust APIs and scalable architectures. You will influence the entire stack within a mission-critical envi...
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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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Join our client in Toronto for a 10-month hybrid contract as a Senior Full Stack Developer. Modernize legacy Classic ASP/VBScript systems using .NET Core, C#, and Entity Framework. Leverage your 5+ years of SQL Server and .NET expertise to build robust backend and responsive UI solutions. Enjoy a...
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Canada , Toronto
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551.64 - 596.33 CAD / Hour
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Randstad
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Senior Software Developer - Full Stack
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Join our client in Toronto for an 11-month contract as a Senior Full Stack Developer. Leverage your advanced Java, SpringBoot, JavaScript/TypeScript, React, and Next.js expertise to architect and build performant web/mobile applications. This role involves mentoring, leading development across th...
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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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Canada , Toronto
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Not provided
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Randstad
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Senior Full Stack .Net Developer
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Join Citi in Mississauga as a Senior Full Stack .Net Developer. Leverage 5-8 years of experience with .Net Core, Angular 10+, and REST/SOAP services. You will design, develop, and implement key applications using modern design patterns and databases. This role offers a chance to solve complex pro...
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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 Full Stack Java Developer
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Join Citi in Mississauga as a Senior Full Stack Java Developer. You will design and build web applications using Java, Spring Boot, and modern front-end technologies like ReactJS. This role requires strong expertise in microservices, RESTful APIs, and both SQL/NoSQL databases. Collaborate with a ...
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Canada , Mississauga
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Salary
94300.00 - 141500.00 USD / Year
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Citi
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Until further notice
Senior Full Stack Developer
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Lead the development of a global client platform as a Senior Full Stack Developer in Mississauga. Utilize your 6+ years of Java/Spring and ReactJS expertise to build scalable microservices and modern front-ends. Mentor a team and shape architecture on a large-scale, real-time technology stack.
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Canada , Mississauga
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120800.00 - 170800.00 USD / Year
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Citi
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Senior or Lead Full-Stack Developer
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Join MaintainX, a leading workflow management platform, as a Senior or Lead Full-Stack Developer in Montreal or Toronto. Leverage your expertise in TypeScript, React, Node.js, and SQL to build impactful web and mobile products. Enjoy a competitive package with equity, comprehensive benefits, and ...
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Canada , Montreal, Toronto
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Not provided
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MaintainX
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Senior Full-Stack Software Developer
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Join our Canadian startup as a Senior Full-Stack Developer. Shape our healthcare product and culture, making foundational technical decisions. We seek a product-minded owner with 4+ years' experience in Node, JavaScript, and CSS. Enjoy equity, work closely with founders, and drive projects from c...
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Canada
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Salary
140000.00 - 200000.00 CAD / Year
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Finni Health
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Until further notice
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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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