Enhance Car Trading Platform with Blockchain Features

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.