Staff Frontend Engineer

US Mobile•Montreal, QC

1d•$140,000 - $230,000

About The Position

US Mobile is building the future of wireless communication with the goal of one unified network open to any person and any device, worldwide. They are empowering customers by offering all three major networks on one phone and one plan, plus home internet from Starlink, with no lock-in or commitments. They provide custom-fit plans at every price point and 24/7 customer support with real people. US Mobile uses real-time feedback from Reddit, surveys, and customer support to inform product roadmaps. Consumer Reports has named them the top-rated mobile carrier two years in a row. They are building innovative systems that scale with a network-agnostic tech stack and agile, cross-functional teams built on trust and mutual respect. This role is for individuals who work fast, flexibly, and collaboratively without compromising standards. We’re looking for a Staff Front-End Engineer to join our growing engineering team as we scale from 14 to 24 developers. This is a high-impact, high-ownership role where you’ll architect and build fast, accessible, and elegant web and mobile applications used by nearly 1 million subscribers across Verizon, AT&T, and T-Mobile. Our challenges are both technical and strategic.

Requirements

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.

Nice To Haves

Experience with Rust, mobile development (React Native), or telecom-related apps.

Responsibilities

Build a state-driven UI that adapts seamlessly to network-specific quirks.
Support legacy and new plans simultaneously.
Create elegant, highly accessible (a11y-first) interfaces that work across platforms.
Work on mission-critical projects, like our next-gen agentic AI chatbot that’s redefining how customers interact with mobile support such as: Customer centric interface enabling total control over your phone lines, a next generation dashboard to monitor your usages and create an e-commerce expereince that's unmatched in Telco!!
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.