We are seeking a highly accomplished Senior Development Specialist for an enterprise-level contract opportunity based in Toronto. In this role, you will take on a premier full-stack web application development, front-end architecture, and system integration capacity, specializing in building responsive, accessible, and secure web applications.

As a Senior Development Specialist, you will bridge the gap between complex system architectures, RESTful web services, responsive user interfaces, and backend enterprise integrations. Operating within a flexible hybrid work model in Toronto, you will lead the end-to-end design, development, and maintenance of single-page applications using up-to-date JavaScript frameworks, web components, and secure API integrations. This position demands a technical software authority with extensive tenure in front-end development, API engineering, root-cause troubleshooting, and digital accessibility compliance (WCAG 2.1 AA / AODA) who can deliver high-quality, customer-facing digital solutions.

Location: Toronto, ON

Assignment Type: Hybrid

Contract Duration: 6-month contract (with potential for 6-month extension)

Advantages

- Modern Front-End Stack: Develop single-page applications utilizing React, Stencil.js (Web Components), JavaScript/TypeScript, and Bootstrap.
- Accessibility Leadership: Drive accessibility-first web engineering strictly compliant with WCAG 2.1 AA and AODA standards across web and mobile form factors.
- Full-Lifecycle Engineering: Lead application architecture, API integration design, root-cause analysis, and production deployment across multi-tier environments.
- Flexible Work Model: Benefit from a balanced hybrid working structure with remote flexibility.

Responsibilities





- Provide senior-level technical expertise and architectural guidance across all phases of the software development life cycle, including design, coding, testing, and sustainment.
- Design, build, upgrade, and maintain secure, responsive front-end single-page applications and supporting component libraries.
- Architect and implement RESTful API integrations (JSON/XML), authentication services, and secure data exchange mechanisms with core enterprise systems.
- Develop intuitive, accessible user interfaces that enable authenticated users to request, view, and interact with aggregated data.
- Author comprehensive technical specifications, system architecture diagrams, interface designs, component specs, and integration documentation.
- Conduct root-cause analysis during unexpected outages and provide rapid troubleshooting, debugging, and production support.
- Ensure all user interfaces and digital components strictly comply with WCAG 2.1 AA guidelines, AODA requirements, and municipal digital standards across web, iOS, and Android platforms.
- Partner with cross-functional development teams, solution architects, and project managers to plan, estimate, and deliver work packages.
- Support application deployment activities across development, testing, staging, and production environments.
- Deliver technical walkthroughs,



knowledge transfer sessions, and operational documentation to steady-state support teams.

Core Technical & Software Engineering Requirements

- Education: Post-secondary education in Computer Science, Software Engineering, or a related discipline (or equivalent practical experience).
- Front-End Development Experience: Minimum 10+ years of extensive experience developing Single Page Applications using HTML5, CSS3, JavaScript, jQuery, Bootstrap, and frameworks such as React, Backbone, or Stencil.js (Web Components).
- API & System Integration: Extensive experience integrating web applications with backend platforms via RESTful APIs (JSON and XML), secure authentication services, and data transfer protocols.
- Accessibility Standards: Demonstrated expertise developing digital products compliant with WCAG 2.x AA, AODA, and WAI-ARIA standards, optimizing accessibility across web and mobile platforms.
- Architecture & Documentation: Proven experience working independently to build and maintain architecture diagrams, technical design specifications, risk assessments, and integration documentation.
- Troubleshooting & Maintenance: Strong experience conducting root-cause analysis, debugging complex multi-tier applications, and providing production support during outages.

Preferred Assets & Domain Experience

- Secure Enterprise Solutions: Experience developing secure, customer-facing web applications within a public-sector or highly regulated enterprise environment.
- Technical Leadership: Track record of providing technical leadership, effort estimation, and mentoring on large-scale software projects.

Soft Skills & Delive

📌 Senior Development Specialist (Toronto)
🏢 randstad canada
📍 Toronto