Mobile App Engineer - iOS

We're looking for a Mobile App Engineer (iOS) to join Fullstack.

Fullstack Trade is building the only unified front-end trading app for retail crypto – perps, cross-chain spot, and prediction markets under one portfolio margin balance. No bridging, no fragmentation. Founded by Flood, creator of Insilico Terminal ($900B CEX volume, 90% market share), and Robin, operated a leading CEX and on-chain HFT firm. Launching Jan/Feb 2027.

You will

• Build Fullstack's first mobile trading app from zero: the full trading experience, not a "pocket" version.

• Work with live market data, complex order types, and WebSocket streams with reconnection logic.

• Design gesture-driven UI and fast interactive charts that fit a professional terminal on a small screen.

• Integrate native wallets, biometric auth, transaction signing, and on-device key storage.

• Own the full App Store release cycle and CI/CD.

• Lay down the mobile architecture future engineers will build on.

Requirements

• 3+ years of iOS experience in Swift.

• Shipped a mobile app from zero to one, through App Store review to production.

• Real-time data and WebSockets experience.

• Strong UI/UX sensibility: wireframing, gesture-driven interfaces.

• High ownership: ready to lead mobile from scratch.

• You actively trade crypto or perps, or build trading side projects.

• On-site 5 days/week in SoHo, NYC.

Stack

• Swift, iOS, WebSockets, REST APIs, CI/CD, App Store.

Nice to have

• Fintech, trading, or real-time data mobile apps.

• Crypto-native app experience (wallets, exchanges).

• VC-backed startup experience.

• Public GitHub or App Store portfolio.

We offer

• Up to $300k/year salary + equity.

• Ownership of mobile from the first line of code.

• Small, fully on-site engineering team in SoHo, direct work with the founders.