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Randstad Logo Randstad · IT - Software Development

Senior Software Developer - Full Stack

Canada, North York · Job Posted May 29, 2026
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Job Description

We are seeking a highly skilled Senior Full Stack Software Developer to design, develop, and optimize complex, cloud-native web applications. This role requires an expert capable of driving both modern front-end user experiences and robust back-end ecosystem components. You will collaborate closely with cross-functional product and architecture teams to transform user stories, wireframes, and data models into highly scalable, accessible, and secure digital products.

Job Responsibility

  • Full-Stack Engineering: Lead end-to-end development initiatives, ensuring the entire application stack is engineered for speed, responsiveness, and seamless vertical integration
  • Architecture & Database Management: Assist in the design of overall solution architectures, design and deploy relational databases, and manage data access layers using Entity Framework or equivalent ORM tools
  • API Construction: Design, construct, and maintain secure REST API services, ensuring efficient data exchange and clean integration with front-end user interfaces
  • Modern Web Frameworks: Build and modernize web applications using React, Next.js, and Node.js alongside Cloud-Native, PaaS, and Java EE application architectures
  • Design & Documentation: Create application designs, technical specifications, and object-oriented UML models using design tools like PowerDesigner
  • QA & DevOps Support: Support continuous quality processes including unit testing, test automation, load testing, and penetration testing, while maintaining CI/CD pipeline integrity
  • Enterprise Production Support: Provide tier-3 application support, encompassing complex incident investigation, troubleshooting, and delivering long-term architectural fixes
  • Compliance & Standards: Ensure all software deliverables conform to Web Content Accessibility Guidelines (WCAG) and Accessibility for Ontarians with Disabilities Act (AODA) frameworks
  • Collaboration & Knowledge Sharing: Provide technical consultative support to teammates and facilitate ongoing knowledge transfer throughout all stages of the contract lifecycle

Requirements

  • Advanced proficiency in React, Next.js, Node.js, and core web engineering utilizing JavaScript and TypeScript
  • Robust experience with Entity Framework (or similar ORM tools), advanced SQL writing, and building REST APIs
  • Deep knowledge and practical application of WCAG and AODA guidelines for public-facing web applications
  • Experience working with or migrating Java EE technologies (Spring Boot, Spring MVC, JPA, WebLogic, Tomcat)
  • Strong background in Agile/Scrum delivery models, product backlog navigation, and rapid application lifecycle workflows
  • Superior analytical, troubleshooting, and negotiation skills with a proven track record of meeting strict production release timelines

What we offer

  • Modern Architecture Focus: Gain extensive hands-on experience driving next-generation architectures using Next.js and serverless microservices
  • End-to-End Ownership: Take full ownership of feature sets spanning database design, backend logic, frontend presentation, and pipeline automation
  • Cross-Functional Visibility: Act as a key technical liaison alongside UX Designers, Cloud Architects, and Product Managers to define technical strategy
  • Strategic Modernization: Contribute significantly to the technical renewal and migration of foundational enterprise business systems
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