Mobile Engineer - React Native

Excellent opportunity to grow skills and autonomously own your work. From design to implementation, have a strong voice in how the client approaches mobile development and a very large real world impact.

. Work on meaningful products supporting agriculture, sustainability, and digital transformation.

. Collaborative and innovative engineering environment.

. Opportunity to shape mobile platform strategy, architecture, and engineering culture.

. Growth through technical leadership, mentorship, and complex product challenges.

This role must be performed at our client site in St Louis, MO, however a hybrid working model is acceptable.

Your future duties and responsibilities:

. Build and maintain cross platform mobile apps using React Native, JavaScript, and TypeScript.

. Lead mobile architecture for scalability, performance, reliability, security, and maintainability.

. Define coding standards, reusable patterns, shared libraries, and engineering best practices.

. Optimize app startup time, memory usage, rendering, network performance, bundle size, and offline behavior.

. Integrate REST APIs, GraphQL, Firebase, analytics, crash reporting, push notifications, and third party SDKs.

. Build offline first features, including local storage, caching, sync, background processing, and conflict resolution.

. Develop native Android or iOS modules when required.

. Collaborate with product, design, backend, QA, security, and business teams.

. Drive decisions on state management, testing, CI/CD, release processes, and mobile tooling.

. Lead app releases, App Store and Play Store readiness, phased rollouts, and production monitoring.

. Troubleshoot complex production issues related to crashes, performance, authentication, sync, and devices.

. Mentor engineers through code reviews, design reviews, documentation, and technical guidance.

. Identify technical debt, platform risks, and opportunities for modernization., Serve as a technical leader and trusted advisor for mobile initiatives.

10+ years of software engineering or mobile development experience.

. 5+ years of React Native, JavaScript, and TypeScript experience.

. Strong knowledge of React Native architecture, hooks, navigation, rendering, native modules, and state management.

. Strong mobile architecture experience, including modular design, reusable components, and scalable code organization.

. Experience with performance tuning, debugging, profiling, memory optimization, and crash analysis.

. Experience building offline first apps with local databases, secure storage, caching, sync, and background processing.

. Experience integrating APIs, GraphQL, Firebase, analytics, crash reporting, and mobile SDKs.

. Native Android experience with Kotlin/Java or native iOS experience with Swift/Objective C.

. Knowledge of App Store and Play Store deployment, signing, certificates, provisioning, versioning, and rollouts.

. Experience with CI/CD tools such as GitHub Actions, Azure DevOps, Fastlane, or Jenkins.

. Strong understanding of mobile security, testing frameworks, observability, logging, and production monitoring., Bachelor’s degree in Computer Science, Engineering, IT, or equivalent practical experience.

. Strong problem solving, debugging, decision making, and communication skills.

. Ability to lead technical work and influence teams without formal authority.

. Ownership mindset with a passion for building reliable, secure, user centered mobile applications.

Preferred Skills

. Enterprise scale mobile app experience.

. Experience in agriculture, sustainability, field operations, logistics, IoT, geospatial, or data driven domains.

. Experience with maps, location services, geofencing, background tracking, camera, Bluetooth, sensors, or device hardware.

. Knowledge of accessibility, design systems, monorepos, feature flags, A/B testing, and remote configuration.

. Experience with Agile/Scrum teams and cloud platforms such as AWS, Azure, or Google Cloud., + GraphQL

• React JavaScript

• React Native

• Typescript

• Agile

• Cloud Computing

CGI is required by law in some jurisdictions to include a reasonable estimate of the compensation range for this role. The determination of this range includes various factors not limited to skill set, level, experience, relevant training, and licensure and certifications. To support the ability to reward for merit based performance, CGI typically does not hire individuals at or near the top of the range for their role. Compensation decisions are dependent on the facts and circumstances of each case. A reasonable estimate of the current range for this role in the U.S. is $89,600.00 - $176,300.00.

CGI anticipates accepting resumes through August 15, 2026.

CGI’s benefits are offered to eligible professionals on their first day of employment to include:

. Competitive compensation

. Comprehensive insurance options

. Matching contributions through the 401(k) plan and the share purchase plan

. Paid time off for vacation, holidays, and sick time

. Paid parental leave

Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because…

You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.

You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.

Come join our team-one of the largest IT and business consulting services firms in the world.