Remote React Native Mobile Engineer — Offline-First & P2P

Alpha Efficiency; Santa Fe Capital; Remote; ARS 123,632,000 - 185,448,000; Full time

Benefits offered by this job

Fully remote contractor role

Core US time-zone overlap

One app to own from files to release

Autonomy on sync, storage and release

AI-assisted coding workflow with CI

Job summary

Tether is seeking a Mobile Engineer (React Native) to own an offline-first iOS/Android app from setup through public launch on App Store and Google Play. You’ll collaborate with a lead and backend developer, review code, add tests, and make sync/storage decisions in a fully remote LATAM-friendly setup.

The role emphasizes sprint-driven development, risk notes to clients, and delivering a robust, store-ready app with monitoring for sync issues.

Qualifications

• 4+ years building mobile applications, including React Native, with apps released on App Store and Google Play.
• Offline-first architecture: local storage, queued writes, retries and conflict handling.
• Proven performance tuning on low-end Android devices, measuring startup time and memory impact.
• Daily use of AI coding tools (Cursor, Claude Code) with TypeScript, automated tests and CI around it.
• Clear written and spoken English for PR descriptions, risk notes and client communications.
• Experience working from written acceptance criteria and the ability to push back if needed.

Responsibilities

• Set up and manage Apple and Google developer accounts, signing, CI builds and testing tracks.
• Build local storage, write queue and retry logic to keep the app functional offline.
• Define and align sync and upload APIs with backend developers; resolve conflicts.
• Implement phone-number sign-in with SMS verification and push notifications fallback to SMS.
• Manage app stores submissions, privacy disclosures and monitoring for sync failures.
• Review diffs, add tests missed by agents, and ensure sprint acceptance criteria are met.

Skills

React Native

Offline-first

Performance tuning

AI coding tools

TypeScript

CI/CD

English communication

Acceptance criteria

Tools

Cursor

Claude Code

Job description

Tether is seeking a Mobile Engineer (React Native) to own an offline-first iOS/Android app from setup through public launch on App Store and Google Play. You’ll collaborate with a lead and backend developer, review code, add tests, and make sync/storage decisions in a fully remote LATAM-friendly setup.

The role emphasizes sprint-driven development, risk notes to clients, and delivering a robust, store-ready app with monitoring for sync issues.