Andotechnologies

Frontend Engineer — React Native (Expo / JSI) (Contract to Hire)

Latin & South America | Remote. Posted 2 months ago

The role

You will take ownership of the React Native/Expo mobile app and focus on the native layer including JSI and native modules. You will build features, manage Expo SDK upgrades, and handle performance-sensitive flows.

What you will do

  • Build and maintain features in the Expo/React Native app.
  • Write and debug JSI/TurboModule and native module code in Swift/Objective-C and Kotlin/Java.
  • Use AI agents as a core part of the daily workflow for writing, debugging and testing code.
  • Own performance-sensitive flows like list rendering, animations, and cold-start time.
  • Implement push notifications, deep linking, and background/foreground behavior.
  • Manage Expo SDK upgrades and native dependency compatibility.
  • Maintain EAS build and CI/CD workflows.
  • Write Jest/React Native Testing Library coverage.
  • Triage and resolve crash and stability issues through Sentry.
  • Collaborate with backend engineers and design.

Required qualifications

  • 4+ years of professional React Native experience, including apps built or ejected from Expo.
  • Hands-on experience with JSI, TurboModules, or writing native modules in Swift/Objective-C and Kotlin/Java.
  • Strong TypeScript and React fundamentals.
  • Comfort debugging across the JS/native boundary (Xcode, Android Studio, Flipper/React Native DevTools).
  • Experience with push notification systems, deep linking, and background task handling on iOS and Android.
  • Familiarity with mobile CI/CD (EAS Workflows, Fastlane, or similar) and app store release processes.
  • Startup mindset: a self-starter who works well independently and is comfortable with ambiguity.
  • Practical testing instincts with Jest and React Native Testing Library.
  • Comfortable working from a REST/OpenAPI contract.

Nice to have

  • Experience with Reanimated, Skia, or other native-driven animation libraries.
  • Experience instrumenting and triaging crash/performance data in Sentry or similar tools.
  • Familiarity with Next.js/React/TypeScript for occasional cross-platform (web) contributions.
  • Background building consumer or field-worker apps at meaningful scale.
  • Prior experience at an early-stage startup.

About the company

Ando is building AI-native workforce infrastructure for the 80M hourly workers in the U.S. and hundreds of millions globally. It is a Seed-stage company backed by Slow Ventures and experienced operators.