A single platform powering trading, payments, and yield across every asset class.

Mobile App Engineer

New YorkOn-site$185K - $300K3 - 16 yearsReferral bonus eligible
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Your first year starts with a mandate that few mobile engineers get: own the architecture of a trading and payments experience from the moment someone opens the app. You will ship a Swift-based interface that turns market data, order flow, and multi-asset custody into something that feels as responsive as a consumer app but handles the stakes of institutional finance. This means sweating the milliseconds between a price update and a screen render, designing offline-aware transaction flows, and building the component library that a growing engineering team will rely on for years. You will work directly with the people designing the order book and the settlement layer — there is no middle layer of product managers buffering you from the engineers who write the matching engine.

What they're looking for

  • Deep fluency in Swift and a strong point of view on iOS architecture patterns you've battle-tested in production
  • Experience wiring mobile clients to REST APIs and WebSocket streams where latency and consistency are both non-negotiable
  • Comfort owning CI/CD pipelines and build tooling for a mobile codebase that multiple engineers ship to daily
  • At least 3 years building consumer-facing apps where real-time data, user assets, or financial instruments were core to the experience

Tech stack

SwiftREST APICICD

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This role is one we're recruiting for on behalf of a client company; the client's identity is kept confidential at this stage. A Fluency recruiter will follow up with details.

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