Cross-Platform Forex Trading App

I need a full-stack developer who can turn my Forex-only trading concept into a polished product that runs smoothly on iOS, Android and the Web. The first milestone is all about speed and reliability: live quotes must stream in real time and stay perfectly in sync across every device. If you like working with WebSocket feeds, push-based APIs, or any other low-latency market-data solution, you will feel right at home on this project.

I already know the core feature set for version 1.0:

• Real-time market data: integrate a rock-solid Forex price feed and display it in a responsive interface.
(Charting tools and portfolio management can follow later, so design with future expansion in mind.)

Suggested tech is up to you—React Native, Flutter, Swift/Kotlin + React/Vue/Angular, or another cross-platform stack are all fine as long as the end result is fast, stable and easy to maintain. Clean architecture, clear documentation and Git-based version control are must-haves so I can keep extending the app after launch.

Deliverables for this first release
1. A single codebase that builds for iOS, Android and modern browsers.
2. Real-time Forex data streaming and rendering with intuitive UI controls.
3. Simple onboarding flow (email / social login) and secure session handling.
4. Build & deployment instructions I can reproduce on my own machine.

Acceptance criteria
• Quotes update in under one second on a 4G connection.
• No crashes or memory leaks during a 24-hour soak test.
• Source code passes linting and unit tests you provide.

Tell me which data provider, framework and architectural pattern you propose, along with any prior examples of live-data apps you have shipped. I’m ready to start as soon as we agree on the stack and timeline.