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Senior Front-End​/Full-Stack Developer to design, develop, and maintain scalable, secure, and accessible cloud

Job in Toronto, Ontario, M5A, Canada
Listing for: S.i. Systems
Full Time, Contract position
Listed on 2026-06-07
Job specializations:
  • Software Development
    Front End Developer, Full Stack Developer, React.js, Java Developer
Job Description & How to Apply Below
Position: Senior Front-End / Full-Stack Developer to design, develop, and maintain scalable, secure, and accessible cloud-based

Position Title:

Senior Front‑End / Full‑Stack Developer

Line of business: GAM (Global Asset Management)

Duration/end date: 5 months (Oct 31, ) - Possibility of Extension or Conversion

Working hours:

Standard 9 to 5pm

Location:

Downtown Toronto (Hybrid: Tuesday & Thursday on site – 3 days remote for now)

Reason why opened:
Additional work

Project: GAMX Digital

Team size: 10 people

Team culture:
Collaborative

Candidate value proposition:
Exposure to high level project on Front End Technologies

Design, develop, and maintain scalable, secure, and accessible cloud‑based applications supporting business‑critical digital experiences. The role contributes across the full software development lifecycle, from translating business requirements into technical designs through development, testing, deployment, and ongoing support, in alignment with enterprise architecture and governance standards.

The position is front‑end led, with responsibility for building modern web interfaces using Next.js-based architecture, while integrating with backend and platform services in a regulated environment.

Key Responsibilities

  • Build end‑to‑end solutions using React, Next.js, and Node.js aligned to enterprise architecture standards
  • Develop, maintain, and scale complex React applications using modern patterns and best practices
  • Design and implement reusable, high‑quality UI components and frontend libraries
  • Apply SSR/SSG patterns to optimize performance, SEO, and user experience
  • Contribute to frontend architecture and technical design, including component strategy and framework decisions
  • Translate user and business requirements into technical specifications and design artifacts
  • Write clean, maintainable, well‑documented TypeScript/JavaScript code
  • Conduct peer reviews for code, design, and unit tests to maintain engineering quality
  • Integrate with REST and Graph

    QL APIs and backend services
  • Support system design discussions, including security and performance considerations
  • Collaborate closely with product owners, designers, and engineering teams in an Agile delivery model
  • Optimize applications for performance across browsers and devices
  • Stay current with modern frontend and web platform advancements
  • MUST HAVE:

  • 8+ years of frontend development experience (CORE SKILL)
  • 6+ years of hands‑on React experience
  • 3+ years of Next.js experience in production environments
  • Strong proficiency in TypeScript, JavaScript (ES6+), HTML5, and CSS
  • Proven experience as a senior UI / frontend developer applying engineering best practices
  • Solid understanding of Node.js fundamentals and npm ecosystem
  • Experience with unit testing and TDD
  • Hands‑on experience integrating RESTful and Graph

    QL APIs
  • Proficiency with Git version control
  • Working knowledge of CI/CD principles and tools (e.g., Jenkins, Git Hub Actions)
  • Comfortable working in a fast‑paced, Agile environment
  • Experience supporting public‑facing, high‑traffic applications
  • Familiarity with CDN‑based delivery and frontend performance optimization
  • NICE TO HAVE:

    Banking/Financial Industry experience

    Any specific education/certifications: BA in Computer Science, Engineering (an asset)

    Interview process: 1 Teams & 1 in person

    Interview dates:
    As soon as candidates have been identified

    How many rounds: 2

    Position Requirements
    10+ Years work experience
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