Poolex.ai DEX (AMM)

Poolex.ai DEX (AMM)

The challenge for Poolex.ai was speed to market without compromising on security. The client required a standalone Decentralized Exchange (DEX) functioning identically to Uniswap V2 but fully customized and deployed to the Polygon network to capitalize on a specific market opportunity.

Key Metrics

  • Turnaround Time: 2 weeks (from initial spec to Mainnet deployment)
  • Infrastructure: Polygon (Matic) Network
  • Protocol Core: Uniswap V2 Fork (Factory, Router, Core, Periphery)
  • Frontend: React.js, Web3-React, GraphQL

Tech Stack Overview

  • Smart Contracts: Solidity, Hardhat, WETH9, UniswapV2Core/Periphery
  • Web App: React.js, Redux, Ethers.js, The Graph
  • Deployment & CI/CD: Vercel, GitHub Actions

Engineering Execution

1. Smart Contract Architecture & Deployment

Forking an AMM is not just copying code—it requires precise redeployment of immutable factory and router contracts, managing initialization hashes (init code hash) that dictate how pair addresses are calculated predictably.

Solution: I configured the Hardhat deployment scripts to calculate the new INIT_CODE_HASH necessary for the Router to discover liquidity pairs dynamically. I deployed the Core, Periphery, and a custom Multicall contract on Polygon Mainnet, rigorously verifying source codes on PolygonScan to ensure public transparency.

2. Frontend State Management and Graph Sync

The Uniswap open-source interface is notoriously heavy, carrying a massive amount of historical state and legacy logic.

Solution: I stripped down the heavy React interface to its core swap/pool functionality and rebuilt the UI components to align with the Poolex.ai branding. I then re-pointed the subgraph endpoints and optimized the web3-react connectors to parse Polygon's block intervals smoothly, ensuring real-time price impact and slippage calculations were perfectly accurate on the frontend.

The Business Outcome

In exactly two weeks, Poolex.ai was live. Users could permissionlessly create liquidity pools, swap ERC-20 tokens with negligible gas fees on Polygon, and track their liquidity metrics. The architectural choices ensured that any existing trading bot or aggregator could easily route trades through Poolex using standard AMM interfaces.

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