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MaintainX

Principal Full-Stack Developer – Core

MaintainX

. Set technical direction for daily customer workflows, including scheduling, parts management, and reporting .

Posted 10/15/2026full-timeToronto • CanadaLead💰 CA$130,000 - CA$230,000 per yearWebsite

Tech Stack

Tools & technologies
GraphQLJavaScriptNode.jsReactReact NativeSQLTypeScript

About the role

Key responsibilities & impact
  • Set technical direction for daily customer workflows, including scheduling, parts management, and reporting
  • Solve complex product problems involving dense data-heavy interfaces, large datasets, offline behavior, and multi-site scale
  • Define architecture and engineering practices for newly formed teams
  • Make complex workflows simple on desktop and mobile
  • Lead large, ambiguous projects end to end from planning through production
  • Partner with Product Managers, Designers, and Engineering leadership on team and adjacent-team roadmaps
  • Own long-term technical health, reliability, and performance of a domain
  • Drive architecture decisions and write technical proposals
  • Mentor senior and staff engineers
  • Set code review standards
  • Improve tooling, testing, and delivery practices across teams
  • Join a team of 5 to 10 people and participate in the on-call rotation
  • Own the technical direction of a domain or system within the first 6 months

Requirements

What you’ll need
  • 10+ years of professional experience building full-stack web or mobile products
  • Track record of leading technical work beyond a single team
  • Deep hands-on experience with TypeScript, React, and Node.js
  • Experience designing systems that held up at scale
  • Experience with mobile-first, responsive, iterative development
  • Track record of writing maintainable, testable code
  • Strong written and verbal communication
  • Comfort making progress before the specification is fully settled
  • Day-to-day use of AI tools in the development workflow
  • Nice to have: GraphQL, React Native, or SQL database experience
  • Valuable experience with scheduling or calendar UIs, data-heavy front ends, offline-first or sync architectures, multi-tenant or enterprise platforms, workflow engines, or inventory and transactional systems
  • Legally authorized to work in Canada

Benefits

Comp & perks
  • Equity
  • Annual bonus
  • Benefits package; health coverage, retirement and leave plans differ by country
  • No minimum in-office mandate
  • Day-to-day use of AI tools in the development workflow