Our client is seeking a highly skilled Senior Full Stack Developer to play a key role in designing, developing, and scaling modern web applications that support both internal teams and external clients. In this role, you will leverage your expertise in .NET Core, React.js, JavaScript, Node.js, and JSON to build responsive front-end applications and robust back-end services. You will collaborate with UI/UX designers, product owners, DevOps engineers, and QA teams to deliver high-quality, secure, and scalable solutions. The ideal candidate will have 5–8 years of full stack development experience, a strong background in creating RESTful APIs and SPAs, and hands-on knowledge of cloud environments such as Azure or AWS. If you are passionate about building feature-rich applications, optimizing performance, and leading technical discussions while working in an Agile/Scrum environment, this is an exciting opportunity to make a meaningful impact on high-profile projects.
* 12 month position
Fully Remote
Candidates must be eligible for Government of Canada Security Clearance *

QUALIFICATIONS

• Minimum 5-8 years of experience as a Full Stack Developer building Front-end applications.
• Bachelor’s degree in computer science or equivalent experience.
• Develop a full-featured customer-facing platform with real-time data updates and analytics.
• Implement single-page applications (SPAs) using React that consume backend APIs.
• Design back-end services in .NET Core and Node.js, optimized for performance and scalability.
• Handle large volumes of data exchange using JSON with strong error handling and validation.
• Participate in containerization and cloud deployment (AWS or Azure) as part of CI/CD pipeline.
• Proven experience in building robust and scalable front-end applications using modern JavaScript (ES6+). Strong understanding of core JavaScript concepts, asynchronous programming, and browser-based development best practices.
• Hands-on experience designing and implementing RESTful APIs. Skilled in creating clean, maintainable endpoints that support efficient data exchange between front-end and back-end systems, with a focus on performance, security, and scalability.

Top Skills Required:

• React.js and JavaScript – Advanced front-end development skills for building modern UI components and managing state.
• .NET Core – Solid experience in building scalable and maintainable APIs and services.
• Node.js + JSON – Proficiency in building middleware and working with structured data interchange formats.
• Demonstrates familiarity with application security tools such as Software Composition Analysis (SCA) and Static Application Security Testing (SAST).
• Capable of identifying and monitoring application insights to effectively debug and resolve issues.
• Leads technical discussions and conducts peer code reviews to uphold high-quality coding standards.

Assets:

• Experience with TypeScript, Redux, or GraphQL.
• Exposure to Docker, Kubernetes, and cloud platforms like Azure or AWS.
• Familiarity with CI/CD pipelines and test automation tools (Jest, Mocha, xUnit).
• Knowledge of database systems like SQL Server, MongoDB, or PostgreSQL.
• Strong communication skills and a passion for learning new technologies.

SUMMARY

If you’re interested in learning more please submit your résumé and one of our senior Recruiters would be happy to give you a call to discuss further.
Randstad Canada is committed to fostering a workforce reflective of all peoples of Canada. As a result, we are committed to developing and implementing strategies to increase the equity, diversity and inclusion within the workplace by examining our internal policies, practices, and systems throughout the entire lifecycle of our workforce, including its recruitment, retention and advancement for all employees. In addition to our deep commitment to respecting human rights, we are dedicated to positive actions to affect change to ensure everyone has full participation in the workforce free from any barriers, systemic or otherwise, especially equity-seeking groups who are usually underrepresented in Canada’s workforce, including those who identify as women or non-binary/gender non-conforming; Indigenous or Aboriginal Peoples; persons with disabilities (visible or invisible) and; members of visible minorities, racialized groups and the LGBTQ2+ community.
Randstad Canada is committed to creating and maintaining an inclusive and accessible workplace for all its candidates and employees by supporting their accessibility and accommodation needs throughout the employment lifecycle. We ask that all job applications please identify any accommodation requirements by sending an email to accessibility@randstad.ca to ensure their ability to fully participate in the interview process

• Design, develop, and maintain responsive web applications using React.js and .NET Core.
• Build and maintain robust RESTful APIs and microservices with Node.js and .NET.
• Integrate and parse structured data using JSON for communication between front-end and back-end systems.
• Collaborate with UI/UX designers, PO, BA, DevOps engineers, and QA to deliver high-quality products.
• Troubleshoot, debug, and upgrade software and perform regular code reviews.
• Work within an Agile/Scrum environment to meet sprint deadlines and deliverables.
• Ensure application performance, scalability, and security