CryptoTracker

CryptoTracker is a real-time portfolio analytics platform aimed at active retail traders. Users connect their exchange accounts via API keys or import wallets by address, and the platform aggregates holdings across all sources into a single dashboard. Live price feeds from CoinGecko and Binance update every five seconds via WebSocket. The analytics layer calculates P&L, cost basis, and allocation breakdowns across time horizons. Custom price alerts trigger push notifications and email when a target threshold is hit. The platform is built on a React frontend, a Node.js/GraphQL API, and a PostgreSQL time-series store. It currently serves 10,000+ monthly active users and handles peak loads of 500+ concurrent connections without degradation.