Staff Mobile Engineer

Type: Full Time Location: Remote (NA or EU time zones preferred), primarily async Level: Staff+ Compensation: $180,000+ base, plus significant equity

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About the Company

A small, highly capital-efficient crypto team with a profitable DeFi product already in market, built and run by a very lean crew.

We're now going after a much larger opportunity. The foundation of it is building the best place to trade crypto, spot and perps, from your phone. On top of that sits an original social product with several novel mechanisms. We'll share more with promising candidates, but whatever you're picturing, think bigger.

The Role

You are the first and only engineer in your domain. The job is to take an original product vision and turn it into a robust system, holding the whole architecture and the smallest details in your head at the same time.

Stack. Expo (~54), React Native, TypeScript, Reanimated, embedded wallet infrastructure, viem, Solana, perp DEX SDKs, cross-chain routing and bridging, PostHog, Sentry. Skia, Swift, and Kotlin are a plus.

You Will

• 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.

You Have

• Independently designed, built, and scaled a consumer mobile app.
• Extended React Native itself: new architecture, Hermes, JSI, custom native modules.
• Built gesture-driven motion under concurrent state change.
• Shipped production trading interfaces covering order entry, TP/SL, TWAP, perps, funding, and leverage.
• Implemented on-device key custody for embedded wallets, plus EIP-7702, SIWE, and cross-chain swaps.