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Staff+ Mobile Engineer
Full-time/Company: Arcade
We're the team behind PRJX, the #1 DEX on HyperEVM, which generated $5.4M revenue in year one with 2 full time people. We're building the best place to trade crypto (spot + perps) on your phone and a completely original social product with several novel mechanisms. Role: Staff+ level — $180,000+ and significant equity.
NA/EU timezone ideal.
Responsibilities:
- Build the best mobile trading app in the world.
- Own the entire user experience.
- Keep the interface truthful under live market data.
- Hold 60fps on mid-range Android under sustained load.
- Automate weekly iOS and Android releases.
Requirements:
- Independently designed, implemented, and scaled a consumer mobile app.
- Extended React Native itself across new architecture, Hermes, JSI, and custom native modules.
- Built gesture-driven motion under concurrent state change.
- Delivered production trading interfaces: order entry, TP/SL, TWAP, perps, funding, and leverage.
- Implemented on-device key custody for embedded wallets, EIP-7702, SIWE, and cross-chain swaps.
Nice to have:
- Skia, Swift, Kotlin.
Stack:
Expo (~54), React Native, TypeScript, Reanimated, Privy, viem, Solana, Hyperliquid SDK, cross-chain routing and bridging, PostHog, Sentry, Skia, Swift, Kotlin
Benefits:
- Async
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