Instant, low-fee remittances. Backed by Y Combinator.
About the role
We are building a high-stakes mobile experience where "fast" is the baseline and "fluid" is the requirement. We need an engineer who is obsessed with the mechanics of mobile performance—someone who views a dropped frame as a bug and a 2-second loading state as a failure. You will be responsible for ensuring our app feels like a premium native product while handling complex, real-time financial data.
What they're looking for
- The "Big Three": Expert-level proficiency in react-native-reanimated , react-native-gesture-handler , and react-native-screens
- Data Synchronization: Professional experience with TanStack Query (React Query) or SWR for managing server state, polling, and background refetching
- The Bridge & Beyond: Deep understanding of the React Native architecture (Bridge vs. Fabric) and the ability to write custom TurboModules in Swift or Kotlin when JS performance hits a ceiling
- List Mastery: Proven experience optimizing large datasets using FlashList (Shopify) or highly optimized FlatLists
- Profiling Tools: Mastery of Flipper, React DevTools, and iOS/Android native profilers to identify and kill "Jank."
More about this role
We are building a high-stakes mobile experience where "fast" is the baseline and "fluid" is the requirement. We need an engineer who is obsessed with the mechanics of mobile performance—someone who views a dropped frame as a bug and a 2-second loading state as a failure. You will be responsible for ensuring our app feels like a premium native product while handling complex, real-time financial data.
Zero-Lag Navigation: Architect a 1-1 screen transition map (forward and backward) using Native Stack to ensure hardware-accelerated transitions.
Frame Rate Optimization: Maintain a locked 60 FPS (or 120 FPS on ProMotion displays) across all lists and complex views.
Crash Management: Implement and monitor rigorous error-tracking (Sentry/Crashlytics) to achieve a 99.9% crash-free rate, specifically debugging native-layer memory leaks and JS-thread hangs.
Instant Updates: Engineer a sophisticated data-fetching strategy for "Mission Critical" info (Balance, Transactions, Recipients) that updates seamlessly when moving from background to foreground.
Optimistic UI: Implement "Instant-Success" patterns for payments and profile updates, ensuring the UI reflects user actions before the server...
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