Principal Mobile Apps Developer - React Native

Position Description:

We are seeking a Principal Developer with 10+ years of software engineering experience, including 5+ years of hands-on experience in React Native, JavaScript, and TypeScript, to lead the design and development of high-performance, scalable, and secure cross-platform mobile applications. This role blends deep technical expertise with leadership, driving mobile architecture, platform strategy, and engineering excellence across teams.

Eligible locations: Halifax, NS / St. John's, NL / Fredericton or Moncton, NB / Stratford, PEI
Work model: Hybrid – 2/3 days per week onsite

Your future duties and responsibilities:

• Design, build, and maintain cross-platform mobile applications using React Native.
• Lead mobile architecture decisions ensuring scalability, performance, security, and maintainability.
• Establish and enforce coding standards, reusable patterns, and engineering best practices.
• Optimize application performance including startup time, memory usage, rendering, and network efficiency.
• Integrate REST APIs, GraphQL, Firebase, analytics tools, crash reporting, push notifications, and third-party SDKs.
• Develop offline-first capabilities including local storage, caching, synchronization, and background processing.
• Build and maintain native modules for Android (Kotlin/Java) and iOS (Swift/Objective-C) when required.
• Collaborate with cross-functional teams including product, design, backend, QA, and security.
• Drive decisions related to state management, testing strategies, CI/CD pipelines, and release processes.
• Lead app releases including App Store and Play Store readiness, rollout strategies, and production monitoring.
• Troubleshoot complex production issues related to performance, crashes, authentication, and device compatibility.
• Mentor engineers through code reviews, design discussions, and technical guidance.
• Identify technical debt, platform risks, and opportunities for modernization.
• Act as a technical leader and advisor, influencing mobile strategy and roadmap decisions.

Required qualifications to be successful in this role:

• 10+ years of experience in software engineering or mobile application development.
• 5+ years of experience with React Native, JavaScript, and TypeScript.
• Strong expertise in React Native architecture, including hooks, navigation, rendering, native modules, and state management.
• Proven experience designing scalable mobile architectures with modular and reusable components.
• Strong background in performance optimization, debugging, profiling, and crash analysis.
• Experience building offline-first applications with local databases, caching, synchronization, and background processing.
• Hands-on experience integrating APIs, GraphQL, Firebase, analytics, and mobile SDKs.
• Native mobile development experience (Android with Kotlin/Java and/or iOS with Swift/Objective-C).
• Experience with mobile deployment processes including App Store and Play Store (signing, certificates, provisioning, versioning, rollouts).
• Experience with CI/CD tools such as GitHub Actions, Azure DevOps, Fastlane, or Jenkins.
• Strong understanding of mobile security, testing frameworks, observability, and monitoring.
• Demonstrated ability to lead technical initiatives and mentor engineers.
• Strong communication skills with the ability to explain technical concepts to diverse stakeholders.
• Bachelor’s degree in Computer Science, Engineering, IT, or equivalent practical experience.

CGI is providing a reasonable estimate of the pay range for this role. The determination of this range includes various factors including but not limited to skill set level, geographic market, experience and training, and licenses and certifications. Compensation decisions are dependent on the facts and circumstances of each case. A reasonable estimate of the current range is $75, - $,. This is a existing vacancy.

#LI-HG

Skills:

• JavaScript
• React Native
• Typescript