Staff Frontend Engineer

US-Mobile; Toronto; On-site; CAD 225,067 - 351,667; Full time

Benefits offered by this job

Gym reimbursement

Commute reimbursement

Flexible working hours

Subsidized health benefits

Professional development stipend

Flexible time off

Job summary

US Mobile is looking for a Staff Front-End Engineer to design, build, and maintain high‑performance, accessible web and mobile applications across multiple carriers.

You will scale the engineering team from 14 to 24 developers, own mission‑critical UI systems, and work on next‑gen features such as an agentic AI chatbot.

You’ll lead front‑end work with React, TypeScript, and CSS, promote accessibility and performance, and collaborate with backend, product, and design teams.

Qualifications

• 8+ years of front-end experience building production-grade UIs.
• Expertise in TypeScript, React, and modern styling approaches.
• Experience with state management and data fetching libraries.
• Strong eye for UX/UI detail, accessibility, and responsive design.
• Self-starter who can define high-leverage solutions with minimal oversight.

Responsibilities

• Build a state-driven UI that adapts to network quirks.
• Support legacy and new plans simultaneously.
• Create accessible, cross-platform interfaces.
• Lead front-end features using React, TS, and CSS.
• Design UI components for web and React Native.
• Mentor a high-autonomy engineering culture.

Skills

Front-end engineering

TypeScript

React

CSS-in-JS

State management

Accessibility

UX/UI detail

Self-starter

Cross-platform design

Tools

Tanstack Query

Redux

Zustand

React Native

Rust

Job description

US Mobile is building the future of wireless communication, serving nearly 1 million subscribers. The Staff Front‑End Engineer will design, build, and maintain high‑performance, accessible web and mobile applications across multiple carriers.

The Opportunity

We’re looking for a Staff Front‑End Engineer to join our growing engineering team as we scale from 14 to 24 developers. This high‑impact, high‑ownership role involves architecting and building fast, elegant UI systems and working on mission‑critical projects.

What you’ll do

• Build a state‑driven UI that adapts seamlessly to network‑specific quirks.
• Support legacy and new plans simultaneously.
• Create elegant, highly accessible interfaces that work across platforms.
• Work on mission‑critical projects, such as our next‑gen agentic AI chatbot redefining customer interaction.
• Lead and contribute to building modern front‑end features using React, TypeScript, and CSS.
• Design and build UI components for both web and React Native applications.
• Architect scalable systems to support millions of user interactions across different networks.
• Champion accessibility (a11y) and performance as first‑class concerns.
• Collaborate closely with backend, product, and design teams to drive elegant, data‑informed solutions.
• Work with emerging technologies like Rust where performance or architecture demands.
• Drive and mentor a high‑autonomy, high‑impact engineering culture.

Qualifications

• 8+ years of front‑end engineering experience building production‑grade UIs.
• Proficiency in TypeScript, React, and CSS‑in‑JS or equivalent styling approaches.
• Experience with state management and data fetching libraries (e.g., Tanstack Query, Redux, Zustand).
• A strong eye for UX/UI detail, accessibility, and responsive design.
• Comfort dealing with complexity: legacy code, varied device support, and cross‑platform consistency.
• A self‑starter who can define and deliver high‑leverage solutions with minimal oversight.
• Bonus: Experience with Rust, mobile development (React Native), or telecom‑related apps.

Benefits

• Competitive Salary
• Gym reimbursement
• Commute reimbursement
• Flexible working hours
• Subsidized health benefits (Medical, Dental, Vision)
• Professional development stipend
• Flexible time off

$160,000 – $250,000 a year