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Senior Frontend Engineer

US Mobile15 days ago
Toronto
Senior Level

Top Benefits

Gym reimbursement
Free cellular service on top US network
Free lunch and stocked kitchen in NYC office

About the role

Who you are

  • 6+ 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

What the job involves

  • We’re looking for a Senior 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
  • 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

Benefits

  • Gym reimbursement
  • Free cellular service on the best network in the US
  • Free lunch in NYC office & fully stocked kitchen
  • Metrocard reimbursement
  • Flexible working hours

About US Mobile

Telecommunications
201-500

At US Mobile, we’re on a mission to revolutionize wireless by building the next-generation connectivity platform. Our goal is to connect the next billion wireless devices onto nationwide 4G and 5G networks, including your phone, drone, car, watch, pet tracker, and everything in between. We’re accomplishing this by leveraging cutting-edge technology and customer-focused UI/UX design.

Whether it’s with our high-speed international roaming options, customizable perks, AI-facilitated plan savings, customizable plans, or real-time dashboards, we’re building the industry’s most exciting user experience.

US Mobile’s 4G LTE network reaches more than 300 million Americans and includes international calling to over 200 countries and territories, but you will never hear from an operator at US Mobile. Our real, live Customer Support Representatives are available by phone or chat 24 hours a day, 7 days a week – to keep you connected, informed, and saving with US Mobile.