The ideal candidate is passionate about building efficient, intuitive, and high-quality user interfaces for enterprise-scale SaaS platforms and takes pride in delivering reliable, maintainable software. You will work in a fast-paced, cooperative workplace using Agile/Scrum methodologies to design, develop, and deliver solutions that support evolving business and customer needs.

Location: Downtown Toronto / Brampton - 2 to 3 days per week to start for team ramp up;1-2 days per week after that Start Date: ASAP End Date: to December 2026, will be renewed until December 2027, or longer What You'll Do Design and build responsive, accessible, and user-friendly web interfaces using modern HTML5 and CSS3 Develop robust Node.js/NestJS backend services that integrate with Google Cloud and external APIs Design, develop, and maintain scalable RESTful APIs and backend integrations Write and maintain unit and automated tests to ensure software quality, reliability, and maintainability Collaborate within an Agile/Scrum team to deliver solutions that meet evolving business requirements Contribute to software architecture, technical design, and UI/UX discussions Participate in code reviews and promote engineering best practices Troubleshoot, optimize, and continuously improve application performance and reliability Stay current with emerging technologies, industry trends, and modern web development practices Support a collaborative team culture that encourages learning, knowledge sharing,



and continuous improvement Must Haves 3+ years developing applications with React 3+ years developing applications with Node.js Strong understanding of RESTful APIs and API architecture Nice to Have Experience with JIRA and Confluence Experience with Terraform Experience with Google Cloud Platform (GCP) Our consumer business client is seeking a Senior Fullstack Engineer (10+ years) to develop enterprise-scale SaaS platforms using JavaScript/TypeScript, React, and Node.js This is a fantastic opportunity for an experienced Senior Fullstack Developer (JavaScript/TypeScript) to join a growing software development team. The ideal candidate is passionate about building efficient, intuitive, and high-quality user interfaces for enterprise-scale SaaS platforms and takes pride in delivering reliable, maintainable software. You will work in a fast-paced, collaborative environment using Agile/Scrum methodologies to design, develop, and deliver solutions that support evolving business and customer needs.

Location: Downtown Toronto / Brampton - 2 to 3 days per week to start for team ramp up;1-2 days per week after that Start Date: ASAP End Date: to December 2026, will be renewed until December 2027,



or longer What You'll Do Develop and maintain modern JavaScript/TypeScript single-page applications (SPAs) using React Design and build responsive, accessible, and user-friendly web interfaces using modern HTML5 and CSS3 Develop robust Node.js/NestJS backend services that integrate with Google Cloud and external APIs Design, develop, and maintain scalable RESTful APIs and backend integrations Write and maintain unit and automated tests to ensure software quality, reliability, and maintainability Collaborate within an Agile/Scrum team to deliver solutions that meet evolving business requirements Contribute to software architecture, technical design, and UI/UX discussions Participate in code reviews and promote engineering best practices Troubleshoot, optimize, and continuously improve application performance and reliability Stay current with emerging technologies, industry trends, and modern web development practices Support a collaborative team culture that encourages learning, knowledge sharing, and continuous improvement Must Haves 5+ years of career development with JavaScript/TypeScript and core JavaScript concepts 3+ years developing applications with React 3+ years developing applications with Node.js Strong understanding of RESTful APIs and API architecture Nice to Have Experience developing high-traffic or enterprise-scale web applications Experience with JIRA and Confluence Experience with Terraform Experience with Google Cloud Platform (GCP) Disclaimer: AI may be used in evaluating candidates. This posting is for an existing vacancy.

📌 Full Stack Javascript Developer (Toronto)
🏢 S.I. Systems
📍 Toronto