Senior React Native Mobile Engineer

Mecca Brands; Letchworth; On-site; GBP 85,000 - 110,000; Full time

Benefits offered by this job

Professional development

Health & well-being

Rewards program

Bonus program

Product allowance

40% staff discount

Job summary

MECCA Brands in the United Kingdom is seeking a Senior Mobile Developer to design, build, and maintain high-performance mobile applications using React Native, with iOS Swift and Android Kotlin expertise. You will collaborate with product managers, designers, and QA to deliver scalable, secure experiences, implement CI/CD, and mentor peers while continuously improving performance and code quality.

This role offers a fast-paced, learning-focused environment with opportunities to shape the mobile

Qualifications

• 5+ years of mobile engineering experience with production React Native.
• Experience with Expo including Expo Modules, config plugins and native app configuration.
• Strong knowledge of iOS (Swift) and Android (Kotlin) native development.
• Experience building and maintaining shared component libraries or design systems.
• Strong mobile UI engineering skills including responsive layouts, animations, accessibility, and performance optimization.
• Experience with TanStackQuery for server-state management.
• Experience with Zustand or similar client-state libraries.
• Automation testing for mobile apps using Detox, Maestro, Appium, Jest, or RN Testing Library.
• CI/CD, Git workflows, feature flags, build automation, and continuous delivery.
• Proven experience shipping apps to App Store and Google Play with release management.
• Strong quality mindset: secure, resilient, observable, maintainable apps.
• Clear communication and mentoring abilities.
• Fluent with AI-assisted engineering tools for accelerated development.

Responsibilities

• Design, build, and maintain high-performance mobile applications using React Native, with strong knowledge of iOS (Swift) and Android (Kotlin) for bridging and optimisation.
• Ensure applications meet scalability, performance, accessibility, and security best practices.
• Collaborate with Product Managers, UX/UI Designers, and QA Engineers.
• Design and implement integrations with backend systems and cloud services, leveraging REST APIs.
• Apply a test-first mindset, building automated tests (unit, integration, E2E).
• Continuously enhance the CI/CD pipeline for fast, reliable releases.
• Optimize app performance through profiling, debugging, and monitoring tools.
• Implement mobile security measures (OAuth, JWT, biometric authentication) and privacy standards.
• Participate in code reviews, architecture discussions, and retrospectives.
• Contribute to a culture of learning and excellence, mentoring peers.
• Stay current with mobile technology trends.

Skills

React Native

iOS (Swift)

Android (Kotlin)

Expo

Testing

CI/CD

Security

Code reviews

Mentoring

Tools

Expo

Detox

Maestro

Appium

Jest

RN Testing Library

Job description

MECCA Brands in the United Kingdom is seeking a Senior Mobile Developer to design, build, and maintain high-performance mobile applications using React Native, with iOS Swift and Android Kotlin expertise. You will collaborate with product managers, designers, and QA to deliver scalable, secure experiences, implement CI/CD, and mentor peers while continuously improving performance and code quality.

This role offers a fast-paced, learning-focused environment with opportunities to shape the mobile