Principal Full-Stack Engineer: Architecture & Scale

MaintainX; Montreal , Toronto; Hybrid; CAD 120,000 - 180,000; Full time

Job summary

MaintainX is seeking a Senior Software Engineer to lead the design and delivery of large, ambiguous projects end to end, across desktop and mobile. You will partner with Product, Design, and Engineering leadership to shape roadmaps and ensure scalable, reliable systems.

The role emphasizes hands-on work with TypeScript, React, Node.js, and mobile-first patterns, mentoring others, and raising the bar on testing and tooling. Canada offices in Montreal and Toronto; remote-friendly.

Qualifications

• 10+ years of professional experience leading full-stack web or mobile products.
• Hands-on with TypeScript, React, and Node.js at scale.
• Proven ability to architect and guide multi-team projects.

Responsibilities

• Lead design and delivery of large, ambiguous projects end to end.
• Partner with Product Managers, Designers, and Engineering leadership to shape roadmaps.
• Own long-term technical health: reliability, performance, and scalability.
• Mentor engineers and raise the bar on tooling, testing, and delivery practices across teams.

Skills

TypeScript

React

Node.js

Architecture design

Full-stack development

Mentoring

Communication

Mobile-first development

Testing & quality

AI tooling in dev workflow

Tools

GraphQL

React Native

SQL databases

Job description

MaintainX is seeking a Senior Software Engineer to lead the design and delivery of large, ambiguous projects end to end, across desktop and mobile. You will partner with Product, Design, and Engineering leadership to shape roadmaps and ensure scalable, reliable systems.

The role emphasizes hands-on work with TypeScript, React, Node.js, and mobile-first patterns, mentoring others, and raising the bar on testing and tooling. Canada offices in Montreal and Toronto; remote-friendly.