Crypto & Stock Trading App (React Native + Node.js)

Gate.io needed mobile development support for their trading platform, where users trade crypto, stocks, and ETFs from a single mobile app. The core requirement was speed: real-time price feeds, instant order execution, and live portfolio tracking with zero lag. The app had to handle high concurrency, process financial transactions securely, and meet regulatory compliance standards.

As CTO of M TECHUB LLC, I led the development of the mobile trading experience for iOS and Android.

Real-time portfolio tracking with live charts and P&L calculations

Crypto trading (Bitcoin, Ethereum, Solana, 200+ tokens)

Stock and ETF trading with market, limit, and stop-loss orders

Live price feeds with candlestick charts, technical indicators, and depth charts

Watchlists with custom alerts and price notifications

Secure wallet system with multi-currency support

KYC/AML verification flow for regulatory compliance

Two-factor authentication and biometric login

Transaction history with detailed trade logs

Subscription tiers with premium features (advanced charting, priority execution)

Push notifications for price alerts, order fills, and market news

Frontend: React Native (cross-platform iOS & Android)

Backend: Node.js with high-throughput RESTful and WebSocket APIs

Infrastructure: AWS (EC2, ECS, RDS, ElastiCache, CloudFront)

Database: PostgreSQL for transactional data, Redis for real-time caching

Real-time data: WebSocket connections for live price feeds and order book updates

Security: End-to-end encryption, OAuth 2.0, biometric authentication

Payments: Stripe and Plaid integration for bank linking and ACH transfers

Monitoring: Datadog for performance monitoring and alerting

As CTO of M TECHUB LLC, I led the engineering team on this project. I owned the system architecture, mobile UI/UX direction, backend API design, real-time data infrastructure, payment and wallet systems, and security implementation. I worked closely with Gate.io's compliance team to ensure all trading features met financial regulatory requirements.

Website: gate.com

Built WebSocket infrastructure handling concurrent real-time price streams across 200+ trading pairs

Designed the order matching pipeline for sub-100ms execution latency

Implemented KYC/AML verification flow integrated with third-party identity providers

Built a multi-currency wallet system with secure key management

Achieved 99.99% uptime across the trading infrastructure

Successfully launched on both App Store and Google Play