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PaperDrill

The exchange built for developers, not spectators.

FeaturesArchitectureTech Stack

A live, always-on exchange simulator with a real matching engine and order book. Trade on the UI or connect a bot via API - no KYC, no real money, no risk.

Features

  • Live matching engine - Price-time priority order matching, not a mock.
  • Real-time order book - Watch depth and trades move over a live WebSocket feed.
  • Persistent accounts - Simulated balances, full order history, nothing resets.
  • Public leaderboard (Coming Soon) - See how your strategy stacks up against others.
  • Bot support (Coming Soon) - Connect trading bots via REST API and WebSocket.
  • API-first access (Coming Soon) - Full REST API and API keys for programmatic trading.

Architecture

PaperDrill-Architecture

Tech Stack

Layer Technology
Frontend React + TypeScript + Tailwind CSS
Backend Express + Prisma ORM
Engine Custom matching engine (TypeScript)
Database PostgreSQL (via TimescaleDB)
Cache/Queue Redis
Infra Docker, Nginx, Vercel (frontend)

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The exchange built for developers, not spectators.

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