Mobile Engineer

US Mobile, Inc.; Toronto; Hybrid; CAD 195,000 - 251,000; Full time

Benefits offered by this job

Gym reimbursement

Commute reimbursement

Flexible working hours

Professional development stipend

Flexible time off

Cell phone service (up to $100/mo)

Job summary

US Mobile, Inc. is seeking a senior mobile developer to build cross-platform apps using React Native, TypeScript, and modern CI/CD workflows. You’ll ensure scalable, maintainable features and collaborate with product and design teams to ship polished user experiences.

You have 7+ years in mobile development (5+ with React Native), know iOS and Android UX, and can drive release automation and OTA updates with Expo. A startup mindset, strong communication, and mentoring teammates are essential.

Qualifications

• 7+ years in mobile development with 5 years hands-on React Native experience
• Proven track record of launching apps on App Store and Google Play
• Knowledge of iOS and Android UX principles
• Experience with CI/CD, OTA updates (Expo), and release automation
• Proven ability to thrive in dynamic startup settings and mentor teammates

Responsibilities

• Build cross-platform mobile apps using React Native with modular architecture
• Modernize features and improve performance and scalability
• Collaborate with product and design for high-quality user experiences
• Establish robust testing frameworks and reliable release processes
• Develop and mentor fellow engineers; produce clear documentation
• Research emerging React Native tech and influence design decisions
• Champion UX across the product lifecycle from conception to delivery

Skills

React Native

TypeScript

CI/CD

Startup experience

Team mentoring

Tools

Expo

React Navigation

Job description

US Mobile is building the future of wireless communication. The goal: one unified network open to any person and any device, worldwide. Connection without walls. We’re getting there by empowering customers. All three major networks on one phone and one plan, plus home internet from Starlink. No lock-in. No commitments. Custom fit plans at every price point. 24/7 customer support with real people, empowered to help. We get real-time feedback from Reddit, surveys, and customer support informing product roadmaps and everything we do. It’s working — Consumer Reports named us the top-rated mobile carrier two years in a row.*

And we’re building innovative systems that scale. A network agnostic tech stack. Agile, cross-functional teams built on trust and mutual respect. This work isn’t for everyone. If you work fast, flexibly, and collaboratively — without compromising standards — we want to hear from you.

What You’ll Do:

• Build cross-platform mobile applications using React Native, ensuring modular, extensible, and maintainable architecture.
• Modernize and refactor existing application features to enhance performance, scalability, and future-proofing by leveraging performance metrics and error monitoring platforms.
• Partner closely with product and design stakeholders to create high-performance, user-friendly features with strong visual appeal.
• Establish and maintain robust testing frameworks, reliability standards, and streamlined release processes as well as collaborate with QA to ensure testing coverage.
• Guide and develop fellow engineers while fostering an environment focused on high-quality code, creative solutions, and ongoing skill development.
• Create and maintain clear process documentation as well as contribute to development and design guidelines.
• Research emerging technologies and best practices within the React Native ecosystem; present findings to the team and influence design and technical decisions.
• Champion user experience across the product lifecycle, ensuring designs translate seamlessly into practical, engaging solutions.

Role Requirements:

• Minimum 7 years in mobile development (with 5 years of hands‑on React Native expertise). Proven track record of successfully launching applications on App Store and Google Play.
• Knowledge of mobile user experience principles and the distinct characteristics of iOS and Android platforms.
• Hands‑on experience with continuous integration/deployment, over-the-air updates (such as Expo), and release automation.
• Demonstrated ability to excel in dynamic startup settings—delivering quickly without compromising code quality.
• Excellent interpersonal skills with a passion for knowledge sharing and team collaboration.

Core Technologies We're Currently Building With:

• React Native (0.83+) + TypeScript
• Tanstack ReactQuery
• React Navigation

Benefits:

• Competitive Salary
• Gym reimbursement
• Commute reimbursement
• Flexible working hours
• Professional development stipend
• Flexible time off
• Cell phone service (up to $100/mo)

$140,000 - $180,000 a year