Title: Add Blockchain & Smart Contract Features to My Car Trading Platform (4–5 New Abilities) Description: I already have a working car trading web platform where users can list, buy, and sell vehicles. Now I want to enhance it with blockchain-powered features to improve trust, transparency, and automation in transactions. I’m looking for an experienced blockchain/full-stack developer (or team) who can integrate around 4–5 new abilities from the list below. Planned New Abilities (We will finalize the exact list together based on your expertise.) Smart Contract–Based Escrow System Automatically hold buyer funds until vehicle delivery confirmation. Release funds when both parties confirm the transaction. Ethereum, Polygon, or Binance Smart Chain preferred. NFT Vehicle Ownership Certificates Each listed car is represented as an NFT containing VIN, history, and metadata. Transfer NFT when ownership changes. Option to mint on low-gas chains. Blockchain Transaction History Record all trades on-chain for public verification. Allow users to view transaction history per car. Crypto Payment Integration Accept major cryptocurrencies (ETH, USDT, BNB, etc.) for car purchases. Automatic price conversion to local currency. Decentralized Identity Verification (DID) Use blockchain-based KYC/ID solutions for verified sellers/buyers. Integrate with existing login system. AI + Blockchain Data Fusion (Optional) Combine blockchain verification with AI recommendations for cars. Example: Use verified on-chain car data to improve buyer trust scores. Tech Requirements Experience with Solidity, Web3.js / Ethers.js, and smart contract deployment Familiar with Node.js, React, or your backend stack Knowledge of crypto wallet integration (MetaMask, WalletConnect) Understanding of IPFS for storing vehicle documents Bonus: AI/ML integration experience Deliverables 4–5 blockchain-based features added to the existing codebase Smart contracts deployed and tested (testnet first) Clean, documented code and integration guide Security review or testing recommendations Budget: Flexible (depending on scope and chain used) Timeline: ~3–5 weeks Collaboration: Open to milestone-based development Platform Type: Existing centralized web app — will become hybrid Web2 + Web3 Please include in your proposal: Blockchain projects or NFTs you’ve built Preferred networks (Ethereum, Polygon, BSC, etc.) Estimated cost and timeline Brief plan for integration Looking forward to working with a blockchain developer who can bring transparency and innovation to the car trading market.