Senior Fullstack Blockchain Developer

Project Requirements for Blockchain DEX Platform.

Project Overview

• Objective: To develop a decentralized exchange platform that enables users to trade cryptocurrencies with features similar to the following (https://purpleswap.me, https://intuitionexchange.com)
• Target Technologies: React, Node.js/TypeScript, Web3.js, Solidity, Rust, Golang.
• Supported Blockchains: Ethereum, Polygon, Binance Smart Chain (BSC).

Functional Requirements

• User Management
• User registration and authentication via crypto wallets (MetaMask, WalletConnect, etc.).
• Profile management with wallet address display and transaction history.

Trading Features

• Market and limit order functionalities.
• Ability to place and cancel trades.
• Real-time order book updates.
• Support for various trading pairs across Ethereum, Polygon, and BSC.

 Liquidity and Staking

• Liquidity pool creation and management.
• Staking options for users to earn rewards.

Token Support

• Integration with ERC20 tokens and other standards relevant to Polygon and BSC.
• Token listing feature for new tokens based on user requests or governance proposals
• Analytics Dashboard
• Real-time market data analytics (price charts, volume, liquidity).
• User trading performance metrics and profit/loss summary.

Governance

• Implement decentralized governance features allowing token holders to propose and vote on platform improvements.

Technical Requirements

 Frontend Development

• Build the UI using React.js and ensure the interface is responsive and user-friendly.
• Integrate Web3.js for blockchain interactions.

 Backend Development

• Use Node.js/TypeScript for server-side development.
• Implement a RESTful API to manage trades, user data, and liquidity pools.
• Ensure secure storage and handling of user data.
• - Smart Contract
• Develop Solidity smart contracts for key functionalities (trading, liquidity pools, governance).
• If using Rust, ensure compatibility with the targeted blockchain.
• Use Golang for any microservices or backend services that require performance optimization (e.g., handling transactions).
• - Blockchain Integration
• Use Ethereum for primary transactions and smart contracts.
• Implement bridging with Polygon and Binance Smart Chain to allow cross-chain trading.
• Leverage decentralized oracles (e.g., Chainlink) for real-time data feeds.

Security Requirements

•  Conduct smart contract audits to ensure security against vulnerabilities (e.g., reentrancy, overflow).
•  Implement secure wallet interactions and user authentication methods.
•  Regularly update dependencies and apply security patches.

Performance Requirements

• Ensure low latency for transaction processing and user interactions.
• Optimize the platform to handle a significant number of concurrent users and transactions.

Testing Requirements

• Test smart contracts using frameworks like Hardhat or Truffle.
• Frontend and backend unit testing and integration testing.
• Conduct performance testing to assess the scalability of the platform.

Deployment Requirements

• Deploy smart contracts on Ethereum, Polygon, and BSC.
• Set up CI/CD pipeline for deploying frontend and backend applications.
• Use decentralized storage solutions for storing off-chain data if needed (e.g., IPFS).

Documentation Requirements

• Technical documentation for developers about the codebase and architecture.
• User documentation providing instructions on using the DEX platform.
• API documentation for any public APIs provided

Interview stages:

• Screening call with a recruiter
• Test task
• Tech call with client