Mobile Engineer - React Native

Jobgether Srl; Lisboa; Remote; EUR 52,000 - 72,000; Full time

Job summary

Jobgether Srl is seeking an experienced Mobile Engineer to join a fully remote international engineering team. You will build a cross-platform mobile app using React Native and Expo for iOS and Android, focusing on messaging, voice/video calls, media sharing, and device pairing.

You will collaborate with product and design teams to deliver high-quality features, optimize performance, and ensure a robust user experience on mobile devices.

Qualifications

• 2+ years of mobile development experience with React Native.
• Experience with Expo and deploying to iOS/Android platforms.
• Familiarity with build tools like Xcode and Android Studio.
• Nice to have experience with peer-to-peer or decentralized technologies.

Responsibilities

• Develop and maintain a cross-platform React Native app for iOS and Android.
• Implement features for messaging, calls, media sharing, and identity backup.
• Collaborate with product, design, and core technology teams to ship features from concept to release.
• Write unit and end-to-end tests and contribute to CI/CD pipelines.

Skills

React Native

Expo

Mobile development

Performance optimization

CI/CD

Tools

Xcode

Android Studio

Swift

Kotlin

Job description

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Mobile Engineer - React Native based in Portugal. Join a fully remote engineering team building innovative peer-to-peer mobile technology for secure, decentralized communication. In this role, you will develop and enhance a cross-platform application for iOS and Android using React Native and Expo. You will work on features spanning messaging, voice and video calls, media sharing, device pairing, and identity backup.

Combining modern mobile development with an on-device peer-to-peer architecture, you will help deliver a seamless, reliable, and privacy-focused user experience. You will collaborate closely with product, design, and core technology teams to build high-quality features from concept to release. This opportunity is ideal for an experienced mobile engineer passionate about performance optimization, decentralized technologies, and shaping the future of digital communication.

Accountabilities:

Develop and maintain a cross-platform peer-to-peer mobile application, taking ownership of features from implementation through testing and release. Ensure the application delivers a reliable, responsive, and secure experience across iOS and Android. Build, refine, and maintain features for messaging, voice and video calls, media sharing, device pairing, and identity backup. Implement user interfaces and connect them to the peer-to-peer core APIs running directly on the device.

Integrate native mobile capabilities, including push notifications, camera access, biometric authentication, and background tasks. Profile and optimize performance on real devices, focusing on application startup time, extended chat sessions, media processing, battery consumption, and network usage. Write and maintain unit and end-to-end tests to ensure application reliability and prevent regressions. Support stable releases through continuous integration workflows, crash reporting, and systematic debugging.

Collaborate with product, design, and peer-to-peer engineering teams to deliver new features and improve the overall user experience. Participate in code reviews, promote engineering best practices, and maintain a high standard of code quality.

Requirements:

Familiarity with native development languages such as Swift and Kotlin is an advantage. Experience with native development and build tools, including Xcode and Android Studio, is a plus. Experience building applications with peer-to-peer frameworks or working with decentralized technologies is a bonus.

Fully remote working arrangement, with worldwide opportunities. Opportunity to contribute to innovative peer-to-peer technology and privacy-focused mobile applications. Collaboration with an international team of engineers and product specialists. Exposure to modern mobile development practices and a distinctive on-device peer-to-peer architecture. Opportunity to take ownership of end-to-end features and make a meaningful impact on product development. Professional growth through challenging engineering projects involving mobile performance, decentralized communication, and cross-platform development.

Mobile Engineer - React Native Lisbon, Portuguese Republic, PT