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Sr Full Stack Developer (Next.js / NestJS)

Hospitality Full Benefits Career Growth
Company

S.i. Systems

Location

Toronto, Canada

Posted

March 11, 2026

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About This Opportunity

Our client in the Digital Health Space is looking for a Sr Full Stack Web Developer (Next.js / NestJS)

Duration: Until Dec 31st

Location: 1x day onsite downtown

x2 one more front end focused on backend

Key Responsibilities

  • Extend and maintain an existing Next.js application built on React
  • Integrate frontend components with backend APIs (Node/NestJS and Python FastAPI)
  • Collaborate with embedded teams across the broader platform
  • Implement new user-facing features while maintaining performance and stability
  • Work within established architecture, coding standards, and deployment pipelines
  • Participate in code reviews and contribute to maintainable, high-quality code

    • Must-Have Requirements

  • Hands-on experience with Next.js (React-only experience is not sufficient)
  • Strong JavaScript / TypeScript skills
  • Experience working in existing production c...