Mobile Developer (React Native)

Hammerjack Pty Ltd; Philippines; On-site; PHP 420,000 - 700,000; Full time

Job summary

Hammerjack Pty Ltd is seeking a Mobile Developer to join our engineering team and build cross-platform mobile applications. You will work with React Native, Expo, and TypeScript to deliver reliable, user-friendly features that power real-world experiences.

Collaborate with product, design, backend, and QA to integrate APIs and real-time functionality, while optimizing performance and resilience. You will own end-to-end development, contribute to technical docs, and participate in code reviews to

Qualifications

• Bachelor’s degree in Computer Science, Information Technology, Computer Engineering, or a related field.
• 2+ years of professional experience in mobile application development.
• Strong experience with React Native and TypeScript.
• Hands-on experience with Expo and Expo Router.
• Experience integrating and working with REST APIs.
• Strong understanding of React fundamentals, component-based architecture, and state management.
• Experience working with Git and collaborative software development workflows.
• Understanding of mobile application development best practices, including performance, responsiveness, and error handling.

Responsibilities

• Develop and maintain cross-platform mobile applications using React Native, Expo, and TypeScript.
• Build end-to-end mobile features covering multiple user journeys and screens.
• Implement responsive and user-friendly interfaces based on product and design requirements.
• Integrate REST APIs and real-time services into mobile applications.
• Implement real-time features such as chat, notifications, live status updates, and other event-driven functionality.
• Manage application state using tools such as React Query, Zustand, Redux, Legend-State, or similar state management libraries.
• Implement mobile navigation using Expo Router or similar navigation solutions.
• Ensure application reliability and performance, including handling unstable network conditions and implementing appropriate fallback mechanisms.
• Collaborate with backend developers, UI/UX designers, product managers, and QA engineers throughout the development lifecycle.
• Write and maintain technical documentation for features, architecture, and development workflows.
• Participate in code reviews, debugging, testing, and continuous improvement of mobile applications.

Skills

React Native

TypeScript

Expo

Expo Router

REST APIs

Git

React fundamentals

State management

Code reviews

Education

Bachelor’s degree in CS/IT/CE or related field

Tools

React Native

Expo

Expo Router

Git

Redux

React Query

Job description

Join our engineering team as a Mobile Developer to build and maintain cross-platform mobile applications. You will deliver reliable, user-friendly digital experiences by developing end-to-end mobile features with React Native, Expo, and TypeScript, collaborating closely with product, design, backend, and QA to integrate APIs and real-time functionality while ensuring performance and resilience.

Responsibilities

• Develop and maintain cross-platform mobile applications using React Native, Expo, and TypeScript.
• Build end-to-end mobile features covering multiple user journeys and screens.
• Implement responsive and user-friendly interfaces based on product and design requirements.
• Integrate REST APIs and real-time services into mobile applications.
• Implement real-time features such as chat, notifications, live status updates, and other event-driven functionality.
• Manage application state using tools such as React Query, Zustand, Redux, Legend-State, or similar state management libraries.
• Implement mobile navigation using Expo Router or similar navigation solutions.
• Ensure application reliability and performance, including handling unstable network conditions and implementing appropriate fallback mechanisms.
• Collaborate with backend developers, UI/UX designers, product managers, and QA engineers throughout the development lifecycle.
• Write and maintain technical documentation for features, architecture, and development workflows.
• Participate in code reviews, debugging, testing, and continuous improvement of mobile applications.

Required Qualifications

• Bachelor's degree in Computer Science, Information Technology, Computer Engineering, or a related field.
• 2+ years of professional experience in mobile application development.
• Strong experience with React Native and TypeScript.
• Hands-on experience with Expo and Expo Router.
• Experience integrating and working with REST APIs.
• Strong understanding of React fundamentals, component-based architecture, and state management.
• Experience working with Git and collaborative software development workflows.
• Understanding of mobile application development best practices, including performance, responsiveness, and error handling.

Preferred Qualifications

• Experience with React Query or similar data-fetching libraries.
• Experience with state management libraries such as Legend-State, Zustand, or Redux.
• Experience implementing real-time communication, including chat, video, WebSockets, Server-Sent Events (SSE), or similar technologies.
• Experience working with third-party SDKs and APIs.
• Familiarity with mobile payment integrations, authentication, file uploads, or other complex mobile workflows.
• Experience working in healthtech, fintech, e-commerce, or other enterprise applications.
• Experience writing technical documentation and contributing to team knowledge-sharing initiatives.