Mobile Application Developer

React Native App Developer (Contract)

📍 Markham, ON — onsite 4 days/week

📄 6-month contract, extendable

🎯 Intermediate / Senior level

Our enterprise client is looking for a React Native App Developer to build and support field/workforce mobile applications on a modern, cloud-native Azure platform.

You'll own the mobile codebase end-to-end: design, build, test, release, and support in production, working closely with product, design, and backend teams.

What you'll do:

• Design, build, and ship field and workforce apps using React Native / Expo (iOS first; Android as needed)
• Own the mobile codebase through its full lifecycle — implementation, review, testing, release, and production support
• Implement enterprise sign-in (MSAL/Entra-style) and handle session, refresh, and sign-out on-device
• Integrate with backend APIs through an API gateway
• Build within an existing design system, implementing loading, empty, error, and offline states
• Design for real field conditions: one-handed use, gloves, poor network — with clear status when APIs are slow or unavailable
• Write and maintain automated tests for critical flows; debug on physical devices
• Ship through an approved release pipeline (EAS, TestFlight, or MDM)

Must have:

• Proven track record shipping React Native (Expo preferred) apps to a store or MDM
• Strong TypeScript
• Experience with native auth flows on iOS
• Comfortable working against a REST API gateway
• Experience working within a design system and debugging on physical devices

Nice to have:

• Recent Expo experience
• Prior work on field/workforce-facing apps
• EAS / TestFlight / MDM distribution experience
• Accessibility experience