Jobs in Ontario

Jobs across Ontario, Canada. Choose a city or town to search nearby.

109,443 listings · 11,812 employers Counted Sep 21, 2026. How we count

About these jobs

Employers hiring include Loblaw Companies Limited (2,908 listings), Walmart Canada (1,910 listings), Walmart (1,735 listings).

Common roles: Retail sales associate, Project manager, Sales representative.

14,645 of these listings include employer-provided pay. Open a job to see its currency and pay period.

Advertised starting pay
Pay period	Median starting pay	Listings
CAD / year	80,000.00	7,437
CAD / hour	22.00	5,414
USD / year	96,930.00	591
USD / hour	19.50	374
CAD / month	6,439.51	27
CAD / week	1,125.00	19
GBP / hour	35.00	15

Employer-listed minimums from at least 10 listings per currency and pay period. These are advertised starting amounts, not employee salaries. Jobs without a minimum and unusual amounts are excluded.

Workplace classifications: 0% remote, 19% hybrid, 80% on-site, 0% not specified. Hybrid and on-site classifications may be inferred from descriptions. Check the original ad.

Based on the dated count above. Listings can change. How we count

Jobs in Ontario

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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

Apply About employer

Applications open in a new tab.

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.

Apply About employer

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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