Offer summary

Qualifications:

4+ years of experience in crafting production React Native apps using TypeScript., Deep understanding of WebSocket/SSE performance tuning on mobile., Familiarity with native iOS or Android development, including Swift/SwiftUI or Kotlin., Experience with performance profiling tools like Flipper, Xcode Instruments, or Android Studio..

Key responsibilities:

Own the mobile layer for hyper-responsive trading applications.

Ensure low-latency, real-time performance through WebSocket connections.

Collaborate with teams to implement new performance techniques for React Native.

Integrate hardware secure-enclave key custody or wallet libraries as needed.

Job description

Why this role matters

On mobile, every dropped frame or delayed WebSocket packet is a missed fill. React Native can deliver a native-feeling 60 FPS experience when tuned correctly but only if we keep latency low through persistent, bi-directional connections. WebSockets are key to that low-latency, real-time flow, and new performance techniques emerging in 2025 let us push React Native even faster. You will own the mobile layer that makes hyper-responsive trading (and clan trash-talk) possible from a phone.

Requirements

4 + years crafting production React Native apps in TypeScript, including experience hitting 60 FPS on complex list and chart views.

Deep understanding of WebSocket / SSE performance tuning on mobile (heart-beats, batching, incremental JSON, back-pressure).

Familiarity with native iOS or Android bridges and willingness to dip into Swift / SwiftUI or Kotlin when a pure-JS solution isnt fast enough.

Comfort profiling CPU, memory and JS-thread contention with Flipper, Xcode Instruments or Android Studio.

Prior work on trading, gaming or other ultra-low-latency apps & Experience integrating hardware secure-enclave key custody or wallet libraries is a bonus.

Required profile