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Senior Full stack Developer Jobs (On-site work)

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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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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 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 Python Full Stack Developer
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Senior Python Full Stack Developer sought in Bangalore to lead scalable app development with Python, FastAPI, and React/Vue/Angular. Drive AI-powered features, LLM workflows, and microservices using Docker, Kubernetes, and cloud platforms (AWS/Azure/GCP). Expertise in API design, CI/CD, and datab...
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India , Bangalore
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AMD
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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 Full Stack Developer
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Seeking a Senior Java Full Stack Developer (AVP) in Pune. This role requires 8+ years of hands-on expertise in Java, Spring Boot, Microservices, and Angular. You will own architecture decisions, utilize AWS cloud services, and drive CI/CD processes. Join a team dedicated to building and optimizin...
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India , Pune
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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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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 Full Stack Developer
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Seeking a Senior Full Stack Developer in Dallas to lead development projects using Java, Spring, and Angular. You will design scalable web applications, collaborate with cross-functional teams, and optimize performance. This role requires 7+ years of Java experience and strong skills in OOP, web ...
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United States , Dallas
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Zensark
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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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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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Randstad
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Senior Full Stack Developer, E-Commerce
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United States , Palo Alto
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160000.00 - 210000.00 USD / Year
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ALSO
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Senior Full Stack Developer
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Join HPE's Hybrid Cloud team as a Senior Full Stack Developer in Pune. You will design and build large-scale, efficient cloud subsystems for the next-gen GreenLake platform. Leverage your 10+ years of expertise in Java, Spring, React.js, and RESTful APIs. Drive innovation in a role offering profe...
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India , Pune
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Hewlett Packard Enterprise
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Senior Full Stack Java Developer
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Join our Dublin team as a Senior Full Stack Java Developer. Leverage your 10+ years of expertise in Core Java, Spring, and front-end development to manage delivery and mitigate project risks. This role requires a proactive SME skilled in microservices, REST APIs, and Oracle/DB2. Experience with K...
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Ireland , Dublin
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Citi
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Senior Java Full Stack Developer
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Join Citi in Pune as a Senior Java Full Stack Developer. This role requires 5-8 years of experience in application systems analysis and programming. You will lead the development and implementation of software solutions, managing the full project lifecycle. Utilize your expertise to solve complex...
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India , Pune
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Citi
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Senior Java Full-Stack Developer
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Join Citi in Pune as a Senior Java Full-Stack Developer. Utilize your 8+ years of experience with Java, Spring Boot, Microservices, and Angular to drive innovative applications development. You will manage the full project lifecycle, from analysis to implementation, using key technologies like Ka...
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India , Pune
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Citi
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Senior Full Stack Java Developer
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Join Citi's FX Data Analytics & AI team in London as a Senior Full Stack Java Developer. Engineer robust, scalable data pipelines using Java, Spark, and cloud-native technologies within a dynamic trading environment. This role offers a competitive package including bonus, private medical care, an...
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United Kingdom , London
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Citi
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Senior Full-Stack Web Application Developer / Software Engineer
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Seeking a Senior Full-Stack Developer in Bartlett, USA. Lead the design and deployment of applications using JavaScript, Node.js, React, and SQL. Requires 5+ years of experience in building maintainable, full-stack web solutions. Join a team focused on innovative development and robust software e...
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United States , Bartlett
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90000.00 - 180000.00 USD / Year
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apHarmony Inc.
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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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