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Added 18 mins ago
Cloud Infrastructure & DevSecOps Engineer
InfoTrack Canada
Toronto, ON
Full-time
As the Cloud Infrastructure and DevSecOps Engineer, you will own the end-to-end cloud infrastructure and deployment pipeline for InfoTrack Canada. You will unblock critical environment…
Added 18 mins ago
Production Excellence Specialist (Engineer)
Vale
Canada
Full-time
We are currently seeking a Production Excellence Engineer to join our Production Operations team in Long Harbour.
Added 1 hour ago
AUTOMATION ENGINEER
Designhawk Innovations
Engineer, BC
Full-time
We are seeking a skilled hands-on Automation Engineer to join our dynamic team. The ideal candidate will have a strong background in automated controls design, PLC/Script programming, and…
Added 1 hour ago
Principal Engineer - Water
Global Infrastructure
Ottawa, ON
Full-time
…throughout the Americas, Asia, and Europe, the firm provides support on projects of varying size and complexity. Together, we enhance conventional designs with smarter, more resilient…
Added 2 hours ago
Manufacturing Engineer (Contract)
Husky Technologies
Bolton, ON
Full-time
…attracted to bold goals, believe in uncompromising honesty, support mutual respect, care about environmental responsibility, have a passion for excellence and a desire to make a positive…
Added 2 hours ago
Designer, Development (Service)
Husky Technologies
Bolton, ON
Full-time
…attracted to bold goals, believe in uncompromising honesty, support mutual respect, care about environmental responsibility, have a passion for excellence and a desire to make a positive…
Added 2 hours ago
Lead React Native Engineer - Canada
Zazz
Toronto, ON · Greater Toronto Area, Canada
Contract
Role summary: Lead engineer on the delivery team, owning the highest-complexity screens, integrations, and engineering patterns across a production mobile application. The role requires…
Added 4 hours ago
Design Engineer
NP Aerospace
London, ON
$80,000 to $100,000 CAD / year
Full-time
…Military and Law Enforcement personnel. Your work will directly support those who protect and serve our country. As a Design Engineer with NP Aerospace’s Canadian Engineering team, you’ll…
Added 5 hours ago
Senior Software Engineer, Backend, AI Labs
Epiq
Toronto, ON · Greater Toronto Area, Canada
Full-time
…graceful degradation, and carry enough instrumentation to diagnose production behavior. We build on a modern stack and treat design as real work: choices about data models, service…
Added 6 hours ago
Senior Full Stack Developer (Global Security)
Royal Bank of Canada
Toronto, ON
Full-time
The Security Insights & AI - Digital Development team is building production-grade applications within Global Cyber Security. Our team designs, architects, and builds bespoke solutions…
Added 7 hours ago
Senior Data Platform Engineer
Norton Rose Fulbright
Toronto, ON
Full-time
Support production systems and provide Level 3 application support.
Added 7 hours ago
Senior Data Platform Engineer
Norton Rose Fulbright
Calgary, AB
Full-time
Support production systems and provide Level 3 application support.
Added 7 hours ago
Principal Data Engineer - Canada
JobGet
Remote, Canada
$160,000 to $190,000 CAD / year
Full-time · Remote
We serve a diverse range of industries, from food service and customer support to healthcare, logistics, and manufacturing. With access to over 200 million job seekers, our platform…
Added 8 hours ago
Manufacturing Engineer (Contract)
Husky Technologies
Bolton, ON
Full-time
…attracted to bold goals, believe in uncompromising honesty, support mutual respect, care about environmental responsibility, have a passion for excellence and a desire to make a positive…
Added 8 hours ago
Firmware Engineer
Corvita Biomedical
Toronto, ON
Full-time
We are seeking a hands-on Embedded Systems Engineer to own both embedded firmware and MCU-based PCB design for assigned ARK subsystems. This role spans requirements, electronics…
Added 8 hours ago
Designer, Development (Service)
Husky Technologies
Bolton, ON
Full-time
…attracted to bold goals, believe in uncompromising honesty, support mutual respect, care about environmental responsibility, have a passion for excellence and a desire to make a positive…
Added 8 hours ago
R&D Biomedical Engineer
Corvita Biomedical
Toronto, ON
Full-time
We are seeking a Biomedical Engineer to support system integration and multidisciplinary R&D for ARK. The role connects physiological and user needs with measurable engineering…
Added 8 hours ago
Mechanical Engineer: Medical Device Design and Manufacturing
Corvita Biomedical
Toronto, ON
Full-time
We are looking for a hands-on Mechanical Engineer to own the day-to-day mechanical development of the ARK platform, from subsystem requirements and engineering prototypes through design…
Added 8 hours ago
Electrical Engineer
Corvita Biomedical
Toronto, ON
Full-time
The Embedded Systems Engineer owns assigned MCU-based control PCBs, firmware, board bring-up, and embedded production-test implementation. Both roles share reviews and interface decisions.
Added 9 hours ago
AI Mobile Engineer- IOS
Zafin
Toronto, ON
Full-time
The AI Mobile Engineer- IOS is a senior technical implementation role responsible for leading the design and delivery of production-grade agent solutions. Your primary goal is to translate…
Added 10 hours ago
AI Engineer with Python - (Hybrid)
S M Software Solutions Inc
Mississauga, ON
Full-time
We are seeking an experienced AI Engineer with Python with 8+ years of software engineering experience and strong expertise in Python, FastAPI/Flask, AI/LLM applications, REST APIs, data…
Added 10 hours ago
AI Engineer with Python - (Hybrid)
S M Software Solutions Inc
Mississauga, ON
Full-time
We are seeking an experienced AI Engineer with Python with 8+ years of software engineering experience and strong expertise in Python, FastAPI/Flask, AI/LLM applications, REST APIs, data…
Added 10 hours ago
AI Engineer with Python - (Hybrid)
S M Software Solutions Inc
Mississauga, ON
Full-time
We are seeking an experienced AI Engineer with Python with 8+ years of software engineering experience and strong expertise in Python, FastAPI/Flask, AI/LLM applications, REST APIs, data…
Added 11 hours ago
Machine Learning Engineer - Early Career (Canada)
Jobright.ai
Canada
Full-time
…job search. They are seeking an Early Career Machine Learning Engineer to design, build, and maintain scalable infrastructure for AI agents, as well as optimize data processing and develop…
Added 11 hours ago
Machine Learning Engineer - Early Career (Canada)
Jobright.ai
Canada
Full-time
…job search. They are seeking an Early Career Machine Learning Engineer to design, build, and maintain scalable infrastructure for AI agents, as well as optimize data processing and develop…

Zazz

Lead React Native Engineer - Canada

Toronto, ON, Canada
Greater Toronto Area, Canada, Canada

Job type: Contract
Apply by: Oct 21, 2026
Posting language: English
Posted: Sep 21, 2026

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Original job description

Role summary: Lead engineer on the delivery team, owning the highest-complexity screens, integrations, and engineering patterns across a production mobile application. The role requires strong hands-on expertise in React Native 0.76+, New Architecture (Fabric, TurboModules, Bridgeless), TypeScript, Hermes, Expo SDK 52, TanStack Query, Zustand, and Detox, along with native Swift/Kotlin development.

You will own key integrations including Auth0/OIDC, Apple Pay, Google Pay, APNs, FCM, Universal Links, and App Links, with experience in iOS Keychain and Android Keystore for secure token storage. Prior production experience with native-to-React Native replatforming and migration of authentication tokens, push notifications, and cached data is required.

Responsibilities.

Deliver highest-complexity screens and integrations across three delivery waves.
Set engineering patterns, reference implementations, and code standards for the team.
Pair with the client's engineers on paired-programming and knowledge transfer.
Own payment integration, Auth0 identity flow, and push notification architecture at code level.
Lead pull request reviews.
Contribute to Architecture Decision Records.
Support the four self-sufficiency exercises during hypercare (deploy hotfix, onboard from KB, restore during simulated P1, extend using established patterns).

Must-have technical experience

8+ years mobile engineering, minimum 5 years hands-on React Native in production.
Direct production experience with React Native 0.76+ and the New Architecture (Bridgeless, TurboModules, Fabric).
Strong TypeScript, comfortable with strict mode.
Hands-on with Hermes engine and Expo SDK 52 prebuild.
Direct experience with TanStack Query and Zustand.
Detox authorship for end-to-end mobile tests, both iOS and Android.
Prior integration of Apple Pay and Google Pay (tokenised payment handles).
Prior integration of Auth0 or equivalent OIDC identity in mobile.
Prior implementation of APNs and FCM push notifications, including token migration on version upgrades.
Universal Links and App Links deep-link routing.

Native platform expertise (required).

Comfortable reading and writing native iOS (Swift or Objective-C) and native Android (Kotlin or Java) at the level required to author or maintain TurboModules bridging native SDKs into React Native.
Prior experience with iOS Keychain and Android Keystore for secure token storage.

Migration and replatform experience (required).

Direct experience on at least one mobile replatform from native to React Native, in production.
Understanding of auth token migration, push token re-registration, cached data reconciliation on first launch after replatform.

Industry background (preferred).

Regulated Canadian mobile experience (public sector, transportation, financial services).
Bilingual (English and French) app delivery experience.
WCAG 2.1 or 2.2 accessibility delivery.

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More about this job

Responsibilities

The lead engineer will own the development of high-complexity mobile application screens, integrations, and engineering patterns. They are responsible for setting code standards, leading pull request reviews, and managing critical payment and identity architecture.

Requirements

Candidates must have over 8 years of mobile engineering experience, including at least 5 years of production-level React Native expertise. Proficiency in native iOS and Android development, along with experience in replatforming and secure token management, is mandatory.

Skills

React Native
TypeScript
Swift
Kotlin
Expo SDK
TanStack Query
Zustand
Detox
Auth0
OIDC
Apple Pay
Google Pay
APNs
FCM
TurboModules
Fabric

Visa sponsorship

Not detected in the job text

Keywords

React Native
TypeScript
Swift
Kotlin
Hermes
Expo SDK
TanStack Query
Zustand
Detox
Auth0
OIDC
Apple Pay
Google Pay
APNs
FCM
Universal Links
App Links
iOS Keychain
Android Keystore
TurboModules
Fabric
Bridgeless
Mobile Engineering
Replatforming
Architecture Decision Records
WCAG
Accessibility
Public Sector
Financial Services
Transportation

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