Mobile Front-End

About Arrowfin:

We are looking for an experienced React Native Engineer to build the EdgeClear Mobile App from the ground up. ArrowFin is developing a web-based high-performance futures trading platform for EdgeClear, a futures trading brokerage. Your mission is to translate that desktop-grade power into a seamless, reliable, low-latency trading experience on iOS and Android.

You will not just be "porting" a website to a webview; you will be architecting a native-feeling application that handles real-time market data (WebSockets), basic trading order entry, and charting with minimal lag.

Key Responsibilities:

• Architect and build the EdgeClear mobile app for iOS and Android using React Native and TypeScript.

• Implement real-time market data handling (WebSockets or equivalent) while keeping the UI responsive during high-volatility periods.

• Translate complex trading views (order books, DOM, charts, positions) into intuitive, touch-friendly mobile interfaces.

• Integrate with existing backend services and middleware for REST and streaming data.

• Manage native build configurations and support the App Store / Google Play release process.

• Collaborate with the web frontend team to share logic (types, hooks, utilities) and align patterns where appropriate.

• Design for mobile-specific constraints such as unreliable networks, reconnect logic, and safe input handling for trading actions.

• Implement secure authentication.

Possible Stack:

• Core: React Native (latest architecture preferred), TypeScript.

• Styling: NativeWind (Tailwind CSS for React Native) to match our web styling workflow, or standard StyleSheet if performance dictates.

• State Management: React Context / Redux / Zustand (aligned with web architecture).

• Middleware Integration: Consuming our existing Hono + Bun middleware for REST and WebSocket aggregation.

Required Skills:

• B2 or higher English language proficiency is required.

• 3+ years of professional experience with React Native and shipping high-quality iOS and Android apps

• Strong TypeScript skills; comfortable working with strict typing.

• Solid understanding of:

• React Native rendering behavior and performance optimization

• List rendering (FlatList/FlashList) for large or frequently updating data sets

• Navigation, deep linking, and app lifecycle events

• Experience integrating REST APIs and ideally WebSocket-based real-time data.

• Professional traits:

• High autonomy - you may be the primary mobile engineer supported by a team of back-end and front-end developers.

• Attention to detail - especially with critical trading inputs and error handling

• Strong problem-solving mindset, especially around mobile network and offline constraints

Nice-to-Haves:

• Experience building trading, fintech, or other real-time data apps.

• Hands-on work with WebSocket integrations in React Native.

• Experience implementing or integrating mobile charting (e.g., candlesticks, line charts).

• Familiarity with NativeWind or similar utility-first styling on mobile.

• Experience with monorepos or shared packages to reuse code between web and mobile.

• Exposure to native modules (Swift/Kotlin/Java) for performance-sensitive features.

• Experience setting up mobile app testing (unit tests, snapshot tests, or basic E2E flows).