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Added 12 mins ago
GRC Lead
nesto
Canada
Full-time
The GRC Lead owns nesto's governance, risk, and compliance program end-to-end. We've built strong foundations and automated much of our compliance workflow; your role is to elevate it to…
Added 12 mins ago
SAP FICO Lead
Accenture
Toronto, ON · Greater Toronto Area, Canada
Full-time
Coordinate the proposal strategy development, production of proposals and presentations, and leadership through the stages of the company Pursuits Process
Added 42 mins ago
Manager, Payroll
Nutrien
Saskatoon, SK
Full-time
Through the collective expertise of our nearly 26,000 employees, we operate a world-class network of production, distribution, and ag retail facilities. We efficiently serve growers' needs…
Added 42 mins ago
Test Engineering Technologist
Husky Technologies
Bolton, ON
Full-time
…passion of our people around the world and their desire to lead change. At the same time, we are not afraid to expect a lot and strive for leadership in all of our key markets. We are a…
Added 42 mins ago
Designer, Development (Service)
Husky Technologies
Bolton, ON
Full-time
…passion of our people around the world and their desire to lead change. At the same time, we are not afraid to expect a lot and strive for leadership in all of our key markets. We are a…
Added 42 mins ago
Manufacturing Engineer (Contract)
Husky Technologies
Bolton, ON
Full-time
…passion of our people around the world and their desire to lead change. At the same time, we are not afraid to expect a lot and strive for leadership in all of our key markets. We are a…
Added 42 mins 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 42 mins ago
Senior Analyst - Subsurface Innovation - 26209
Enverus
Calgary, AB
Full-time
The energy industry is changing fast. But we’ve continued to lead the way in energy technology, creating intelligent connections across the entire energy ecosystem, from renewables, power…
Added 1 hour ago
Operations Lead
Nutrien
Colonsay, SK
Full-time
Through the collective expertise of our nearly 26,000 employees, we operate a world-class network of production, distribution, and ag retail facilities We efficiently serve growers' needs…
Added 1 hour ago
Software Engineer
Pine
Toronto, ON
Full-time
Troubleshoot production issues and continuously improve application performance and reliability
Added 1 hour ago
LABORATORY SUPERVISOR (OCM)
Bureau Veritas | Marine & Offshore
AB · Edmonton, AB
Full-time
Facilitate the production of high quality defensible data, safely and on time
Added 1 hour ago
Principal AI/ML Engineer
lululemon
Vancouver, BC
Full-time
Demonstrate expert-level coding proficiency by developing critical components of AI platforms, ML infrastructure, and production AI systems when hands-on technical leadership is required.
Added 1 hour ago
AI/ML Engineer
lululemon
Vancouver, BC
Full-time
…engineering, and model training through evaluation, deployment, and production monitoring. You will contribute to meaningful technical decisions on model architecture, training strategies,…
Added 2 hours ago
Senior Security Engineer
PheedLoop
Toronto, ON
Full-time
…and least-privilege access across every machine that touches…
Added 2 hours ago
Electronics Assembler
Viessmann Climate Solutions
Waterloo, ON
Full-time
This role requires regular standing and walking in a production environment, with occasional sitting, bending, reaching, and other postures to access materials and equipment. The position…
Added 2 hours ago
Games Security Specialist
Ubisoft
Montreal, QC
Full-time
You will work hands‑on with production, online, data, moderation, and security partners to identify issues, coordinate responses, and drive concrete mitigation actions related to cheating,…
Added 3 hours ago
Senior Infrastructure, Network & Operations Engineer
Insight Global
Toronto, ON · Scarborough, ON
Contract
…troubleshoot complex issues, and drive infrastructure stability. - Lead infrastructure support activities related to TSA separation and operational transition initiatives. - Manage and…
Added 4 hours ago
Business Development Executive, Financial Services
Avant Imaging & Information Management, Inc.
Toronto, ON · Scarborough, ON
Full-time
…experienced seller who can build a pipeline, open doors and lead complex opportunities from initial outreach through signed…
Added 4 hours ago
Shift Manager
Darmody Family McDonald's
Maple, ON
Full-time
Managers lead shifts every week, making sure customers get a fast, accurate, friendly experience every visit. A Shift Manager provides leadership to crew and other managers during a shift…
Added 4 hours ago
Senior Software Developer
Royal Bank of Canada
Vancouver, BC
Full-time
…take ownership of complex projects from conception through…
Added 4 hours ago
Lead Data Engineer - AI & Machine Learning
Royal Bank of Canada
Toronto, ON
Full-time
5+ years of hands-on experience in software development with 3+ years focused on AI/ML and production deployments.
Added 4 hours ago
Senior Advanced Quality Engineer
Ecolab Inc.
Calgary, AB
Full-time
Lead APQP deliverables (DFMEA, PFMEA, Control Plans, Process Validation) and coordinate PPAP execution to ensure production readiness.
Added 5 hours ago
Production Supervisor
Stephano Group Ltd.
Toronto, ON · Etobicoke, ON
Full-time
Stephano Group Ltd. is a family owned, Canadian food processing company. We are seeking a highly motivated production supervisor to join our growing team.
Added 6 hours ago
Cloud & AI Sales Specialist
Microsoft
Ottawa, ON
Full-time
…cloud services can deliver digital transformation. You will lead a virtual team of sales, technical, and services resources to help customers realize transformation through cloud computing.…
Added 6 hours ago
Halifax Recruitment Specialist
Jobbe
Halifax, NS
Full-time
…done. You will recruit across the firm while also taking the lead role in our law student and articled clerk recruitment…

Zazz

Lead React Native Engineer - Canada

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

Job type: Contract
Apply by: Mar 21, 2027
Posting language: English
Posted: Sep 22, 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.

Equal Opportunity & Accommodation

Zazz is an equal opportunity employer committed to providing a workplace free from discrimination and harassment. We welcome applications from all qualified candidates and do not discriminate on the basis of race, colour, ancestry, place of origin, ethnic origin, religion, age, sex, sexual orientation, gender identity or expression, marital status, family status, disability, or any other characteristic protected by applicable human rights legislation.

Zazz is committed to providing reasonable accommodation throughout the recruitment and selection process. If you require accommodation to participate in the application or interview process, please let us know and we will work with you to meet your accessibility needs.

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More about this job

Responsibilities

The lead engineer will own the delivery 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 at least 8 years of mobile engineering experience, including 5 years of hands-on production experience with React Native. Proficiency in native iOS and Android development, along with experience in mobile replatforming and secure token storage, is required.

Skills

React Native
TypeScript
Swift
Kotlin
Expo SDK
TanStack Query
Zustand
Detox
Auth0
Apple Pay
Google Pay
APNs
FCM
Universal Links
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
WCAG
Accessibility
Architecture Decision Records
Software Engineering
IT Services
IT Consulting

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