Senior Mobile Engineer — React Native & Kotlin (Remote)

Coderio; Ciudad de Mendoza; Remote; ARS 53,372,000 - 128,093,000; Full time

Job summary

Tether is seeking a Mobile Engineer to own Keet Mobile end-to-end, from UI/UX through P2P core integration. You will work remotely from LATAM, with core hours overlapping US time zones and a single app ownership through first public releases on iOS and Android.

You’ll build offline-first features, refine sync and storage, and ensure high-quality tests and CI. Strong English communication and experience with React Native are required.

Qualifications

• 4+ years building mobile apps with React Native and releasing on App Store and Google Play.
• Offline-first architecture with local storage, queued writes and retries.
• Strong written and spoken English for client communications.
• Experience working from written acceptance criteria and pushing back when needed.

Responsibilities

• Own the Keet Mobile app end-to-end from UI/UX to P2P core integration.
• Develop offline-first features and ensure reliable sync and storage.
• Coordinate with backend to design sync/upload APIs and conflict resolution.
• Implement push notifications, camera access, and identity backup.
• Write unit and end-to-end tests; maintain CI and crash monitoring.
• Collaborate with design/product to ensure quality releases.

Skills

React Native

Offline-first

Android/iOS performance

AI coding tools

Communication in English

Acceptance criteria

Tools

Xcode

Android Studio

CI/CD

Testing frameworks

Job description

Tether is seeking a Mobile Engineer to own Keet Mobile end-to-end, from UI/UX through P2P core integration. You will work remotely from LATAM, with core hours overlapping US time zones and a single app ownership through first public releases on iOS and Android.

You’ll build offline-first features, refine sync and storage, and ensure high-quality tests and CI. Strong English communication and experience with React Native are required.