Senior React Native Engineer

US Mobile usmobile.com Open · verified Oct 24, 2026

Hybrid Toronto Montreal Full-time Senior Mobile Engineering

At a glance

Senior Mobile Engineering role at US Mobile. Toronto · full-time · CA$140,000–CA$180,000 base.

SalaryStated by US Mobile

CA$140,000 – CA$180,000

Base salary for this role, in CAD per year, as published in the posting.

This role, from US MobileOur estimate for the market: CA$133,175–CA$175,375Median CA$141,500

The range includes the market median of CA$141,500 for senior mobile engineering roles in Toronto.

Worked out from 10 postings that stated pay, median CA$141,500. Last updated Oct 24, 2026.

RoleMobile Engineering

SenioritySenior

LocationToronto

WorkplaceHybrid

EmploymentFull-time

Base payCA$140,000–CA$180,000

PostedNov 20, 2025 · 11mo ago

Also hiring inMontreal

Role brief

techroles summary, based on the employer's posting.

What you'll do

Build React Native apps for multiple platforms with code that stays modular, maintainable and ready to extend
Use performance data and error monitoring to improve existing features and make the app scale more reliably
Turn product and design plans into polished mobile features, and protect the user experience from design through delivery
Set up testing and release practices with QA, while defining reliability standards for the apps
Support other engineers through guidance, shared development practices and research into React Native approaches

What you bring

At least seven years in mobile development, including five years working directly with React Native
A record of shipping apps through both the App Store and Google Play
Practical experience with CI/CD, over-the-air updates and automating mobile releases
A strong grasp of mobile UX and how iOS and Android differ

Who this fits

This senior role suits an engineer who can move quickly in a startup setting without lowering code quality, and who enjoys collaborating and sharing knowledge. It is based in Toronto with a hybrid arrangement.

From the employer

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.