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Added 14 days ago
RP
Product Owner
Rexall Pharmacy Group LTD
Mississauga, ON
- $80,453 to $95,000 CAD / year
- Full-time
Proven track record of shipping digital products from concept to launch. Strong knowledge of mobile app development processes on iOS, Android, and web platforms.
Added 14 days ago
AR
Senior Mobile Application Developer
Atlas-Apex Roofing Inc.
Toronto, ON
- $90,000 to $120,000 CAD / year
- Full-time
We are seeking a talented and experienced Senior Mobile Application Developer to design, develop, maintain, and enhance high-quality mobile applications for both Android and iOS platforms.…
Added 14 days ago
QA Analyst
Scotiabank
Toronto, ON
Design and implement end-to-end test strategies for native mobile applications (iOS & Android), web platforms, and APIs.
Added 14 days ago
H
Senior Quality Engineer (Automation Testing)
Hays
Toronto, ON
- Contract
Added 14 days ago
RP
Product Owner
Rexall Pharmacy Group Ltd.
Mississauga, ON
- $90,000 to $95,000 CAD / year
- Full-time
Proven track record of shipping digital products from concept to launch. Strong knowledge of mobile app development processes on iOS, Android, and web platforms.
Added 14 days ago
Y
QA Lead
Yochana
Brampton, ON
- Contract
Understanding of mobile platforms (iOS, Android) and their testing requirements.
Added 14 days ago
Y
Quality Assurance Lead
Yochana
Brampton, ON
- Contract
Understanding of mobile platforms (iOS, Android) and their testing requirements.
Added 14 days ago
CO
Application & Integration Technical Analyst
City of Saint John
Saint John, NB
- Full-time
Added 15 days ago
CO
Application & Integration Technical Analyst
City of Saint John
Saint John, NB
- Full-time
Added 15 days ago
Y
QA Lead
Yochana
Brampton, ON
- $40 to $45 CAD / hour
- Contract
Understanding of mobile platforms (iOS, Android) and their testing requirements.
Added 15 days ago
A
Staff PCIe Verification Engineer
Arm
Toronto, ON
- Full-time
…verifying the functionality and the performance of High Speed IOs at Sub-system level. New team members will join hands with other Architects, RTL design and verification engineers spread…
Added 15 days ago
A
Senior PCIe Verification Engineer
Arm
Toronto, ON
- Full-time
…verifying the functionality and the performance of High Speed IOs at Sub-system level. New team members will join hands with other Architects, RTL design and verification engineers spread…
Added 15 days ago
Y
QA Lead (Mobile Testing)
Yochana
Brampton, ON
- Full-time
Understanding of mobile platforms (iOS, Android) and their testing requirements.
Added 15 days ago
V
Need HTML5 interns
Vouchermatic
Canada
- Contract
Are you a passionate HTML5 game developer looking to put your skills to the test? Vouchermatic is launching a game development challenge for young and aspiring developers.
Added 15 days ago
CO
Application & Integration Technical Analyst
City of Saint John
Saint John, NB
- Full-time
Added 16 days ago
CO
Application & Integration Technical Analyst
City of Saint John
Saint John, NB
- Full-time
Added 16 days ago
PA
Senior Developer, Digital
Porter Airlines Inc.
Toronto, ON
- Full-time
Reporting to the Manager, Development and Delivery, the Senior Developer, Digital provides technical leadership and hands-on expertise in designing, building, and maintaining Porter's React…
Added 16 days ago
Engineering Manager, New User Experience
DoorDash Canada
Toronto, ON
Manage a full-stack team encompassing iOS, Android, web, and backend engineers, ensuring seamless collaboration and delivery
Added 16 days ago
CO
Application & Integration Technical Analyst
City of Saint John
Saint John, NB
- Full-time
Added 17 days ago
OA
Principal Software Engineer, React Native
Otto AI
Canada
- Contract
- Lead the architecture and development of our React Native and Expo app across iOS and Android.
Added 17 days ago
Senior Frontend Developer, Market Innovations
HelloFresh
Toronto, ON
Bonus if you have experience with mobile app development, either through React Native or native iOS/Android
Added 17 days ago
A&
IT Field Services Support
Alvarez & Marsal
Toronto, ON
- Full-time
…(imaging/deployment), SCCM, Video & Audio Conferencing administration, Apple iOS, Android, 2FA/MFA mobility support & VOIP connectivity troubleshooting, LAN connectivity troubleshooting,…
Added 17 days ago
IG
Senior iOS Developer
Insight Global
Vancouver, BC · Greater Vancouver Metropolitan Area
- $50 to $70 CAD / hour
- Contract
Insight Global is seeking a Senior iOS Engineer to design, develop, and support large-scale, production-grade mobile applications for a leading retail client. This individual will be a…
Added 17 days ago
M
React Native - Mobile Software Developer (SaaS Healthcare)
MEDFAR
Montreal, QC
- Full-time
As a Mobile Software Developer II, you'll be part of MEDFAR's mobile team, building and evolving cross-platform applications across iOS, Android, and web that bring our healthcare platform…
Added 17 days ago
PA
Senior Developer, Digital
Porter Airlines Inc.
Toronto, ON
- Full-time
Reporting to the Manager, Development and Delivery, the Senior Developer, Digital provides technical leadership and hands-on expertise in designing, building, and maintaining Porter's React…

Otto AI

Principal Software Engineer, React Native

Canada

Contract

Apply About employer

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Job details

Job type: Contract
Posting language: English
Posted: Oct 16, 2026

Original job description

Otto is building a personal AI assistant that runs on a dedicated device and connects to the apps people use every day. Our mobile and desktop apps bring that assistant to users through real-time conversations, connected services, and clear controls over its actions.

We’re looking for a Principal Software Engineer to own the technical direction and hands-on development of our React Native mobile experience.

This is an individual contributor role for someone who combines architectural judgment with strong product instincts. You’ll write production code, solve difficult mobile problems, and help the team ship a polished, reliable app.

What you’ll do

Lead the architecture and development of our React Native and Expo app across iOS and Android.

Build responsive experiences for streaming AI conversations, device onboarding, connected apps, and approvals.

Design reliable approaches to real-time connections, state synchronization, reconnects, and interrupted user journeys.

Work across JavaScript and native platform boundaries, including Bluetooth, authentication, deep links, and push notifications.

Partner closely with design to deliver accessible interfaces with thoughtful interaction details.

Own mobile performance, production debugging, and release quality.

Improve testing, developer tooling, and engineering practices where they meaningfully improve reliability and delivery.

Guide technical decisions and mentor engineers while remaining deeply involved in implementation.

What you’ll bring

Deep experience shipping and maintaining production React Native applications on both iOS and Android.

Experience operating at a principal, staff, lead, or equivalent level, with ownership of significant architectural decisions.

Strong TypeScript and React fundamentals, including rendering behavior, state management, and performance.

Confidence debugging native mobile issues and working with iOS and Android tooling.

A strong understanding of asynchronous systems, networking, and the mobile application lifecycle.

Evidence of owning apps beyond launch: diagnosing failures, improving reliability, and evolving the architecture.

Strong product judgment, attention to interaction quality, and clear communication.

Helpful experience

Expo and Expo Router.

Bluetooth provisioning or connected hardware.

WebSockets, streaming interfaces, and real-time synchronization.

Secure messaging and end-to-end encryption.

Shared mobile and web codebases.

Consumer products and early-stage engineering teams.

Our stack

React Native, Expo, Expo Router, TypeScript, React Query, and tRPC. Our apps communicate through a cloud relay with a Node.js device runtime. An Electron desktop app shares the web experience.

Why Otto

You’ll make foundational decisions across a product that connects mobile, desktop, cloud, and hardware. Your work will directly shape how reliably people can communicate with and use their personal AI assistant.

How to apply

Share your résumé or LinkedIn profile and a mobile product you helped ship. Tell us what you owned and describe a difficult technical decision, its tradeoffs, and the outcome.

Apply About employer

More about this job

Responsibilities

Lead the architecture and hands-on development of Otto’s React Native and Expo apps for iOS and Android, including real-time AI conversations, device onboarding, connected services, and approvals. Own mobile reliability, performance, debugging, and release quality while guiding technical decisions, mentoring engineers, and improving development practices.

Requirements

Requires extensive experience shipping and maintaining production React Native apps on both iOS and Android, with principal-, staff-, lead-, or equivalent-level ownership of architectural decisions. Candidates should have strong TypeScript and React fundamentals, native mobile debugging skills, knowledge of asynchronous systems and app lifecycles, and a track record of improving products after launch.

Skills

React Native
Expo
TypeScript
React
Mobile Architecture
iOS
Android
Mobile Performance
State Management
Real-Time Systems
Networking
Bluetooth
Authentication
Deep Links
Push Notifications
Technical Mentorship

Visa sponsorship

Not detected in the job text

Keywords

React Native
Expo
Expo Router
TypeScript
React
React Query
tRPC
Node.js
Electron
iOS
Android
Bluetooth Provisioning
WebSockets
Streaming Interfaces
Real-Time Synchronization
State Management
Asynchronous Systems
Networking
Mobile Application Lifecycle
Authentication
Deep Links
Push Notifications
Secure Messaging
End-to-End Encryption
Mobile Performance
Production Debugging
Automated Testing
Cloud Relay
Connected Hardware

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