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xTier Technologies
Software Engineering

Senior React Developer

📍 Toronto, ON 💼 Contract 🏠 Hybrid 💵 $95–$115 / hr 📅 Posted May 5, 2026
ReactTypeScriptNext.jsTanstack QueryTailwind CSSCypress

About the role

Our client — a top-five Canadian fintech — is rebuilding their customer onboarding from a legacy AngularJS app to a modern React + TypeScript stack. You’ll be the senior voice in the room: setting front-end standards, mentoring two intermediate engineers, and shipping production code in week one.

What you’ll do

  • Lead architecture decisions on a green-field React + Next.js application
  • Build accessible (WCAG 2.1 AA), performant UI with TypeScript, Tanstack Query, and Tailwind
  • Partner with design to translate Figma into a reusable component library
  • Establish front-end testing standards (Vitest + Cypress) and CI quality gates
  • Mentor two intermediate developers through pairing and code review

What you bring

  • 7+ years building production web apps, with 4+ years in React / TypeScript
  • Strong opinions, loosely held, on state management, accessibility, and testing
  • Comfort working hybrid (2 days/week downtown Toronto)
  • Experience in regulated industries (fin-tech, health, gov) is a plus

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