Job Description: React Native Mobile App Developer (Expo)
Role Overview
React Native Mobile App Developer
Tesco Design System
You will collaborate closely with engineering managers, product managers, UI/UX designers, and backend developers to translate business requirements and designs into seamless mobile experiences.
Key Responsibilities
- Design, develop, and maintain cross-platform mobile applications using React Native and the Expo framework.
- Build reusable, scalable, and maintainable components following established coding standards and best practices.
- Leverage Expo SDK, Expo Router, and EAS workflows to streamline development, builds, deployments, and application updates.
- Develop responsive and intuitive user interfaces aligned with the Tesco Design System and UI/UX specifications.
- Optimize application performance, responsiveness, and scalability across iOS and Android platforms.
- Apply best practices for application accessibility, security, and reliability.
- Debug, troubleshoot, and resolve technical issues across mobile and web environments, where applicable.
- Collaborate with cross-functional teams to understand requirements, estimate development efforts, and deliver quality solutions.
- Stay up to date with the latest React Native, Expo, JavaScript, and TypeScript developments.
Required Technical Skills
- Strong hands-on experience developing cross-platform mobile applications using
React Native and Expo
. - Proficiency in
JavaScript and TypeScript
, including modern ES6+ features and concepts. - Strong understanding of React principles, component lifecycle, hooks, Context API, and state management.
- Hands-on experience with recent Expo SDK versions,
Expo Router (file-based routing)
, and EAS workflows
. - Understanding of React Native architecture, including the JavaScript Interface (JSI) and the native-to-JavaScript interaction model.
- Experience building reusable UI components and working with component libraries or design systems.
- Understanding of mobile application performance optimization, debugging, accessibility, and security best practices.
- Experience developing and maintaining applications for both iOS and Android from a shared codebase.
- Familiarity with application builds, release processes, and deployment workflows using Expo tools.
Good to Have
- Experience implementing or integrating enterprise design systems, preferably the Tesco Design System.
- Familiarity with native iOS and Android concepts and platform-specific integrations.
- Experience with automated testing, debugging tools, and mobile application quality practices.
- Exposure to CI/CD pipelines and mobile application release automation.
- Experience collaborating with backend teams on API integration and application data flows.
Key Expectations
- Strong problem-solving and analytical skills.
- Ability to write clean, reusable, and maintainable code.
- Good communication and collaboration skills.
- Ability to work effectively with cross-functional teams in an agile development environment.
