Blockchain Food Traceability Platform
Budget: ₹12,500 – ₹37,500 INR
I'm launching India's first D2C blockchain-based grocery brand and need a complete blockchain traceability system built on my existing Azure Ubuntu server. The system will enable farmers to upload product data (harvest info + images) which gets stored immutably on blockchain, then displayed to consumers via QR code scanning - similar to how DailyGurus operates but with our own private blockchain infrastructure.
Technical Requirements
Blockchain Infrastructure
Platform: Private Ethereum network using Geth (Go Ethereum)
Consensus: Clique (Proof-of-Authority) for low transaction volume
Server: Deploy on existing Azure Ubuntu server
Expected Volume: Maximum 15 transactions per week (very low volume)
Network: Private blockchain (not public Ethereum)
Smart Contract Development
Language: Solidity
Contract Functions:
addHarvestEvent(batchId, farmerName, location, imageHash)
addProcessingEvent(batchId, processType, qualityReportHash)
getBatchHistory(batchId) - returns complete product journey
Features: Event logging, access controls, immutable data storage
Deployment: Using Truffle framework
Backend API System
Framework: Node.js with Express.js
Blockchain Integration: ethers.js library for smart contract interaction
Image Storage: Firebase Storage integration (free tier)
API Endpoints:
POST /api/harvest - accepts farmer data + image uploads
POST /api/processing - records processing events
GET /api/batch/:batchId - retrieves complete batch history
Security: Environment variables for private keys, CORS enabled
Frontend Consumer Interface
Technology: HTML/CSS/JavaScript with ethers.js
Functionality:
QR code scanning support
Batch ID parameter handling (?batch=ABC123)
Timeline display of product journey
Responsive design for mobile devices
Hosting: Nginx on Azure server with SSL support
System Integration
Web Server: Nginx configuration for static files + API proxy
Mobile App: REST API integration for existing Android app
QR Code Generation: Dynamic QR codes linking to batch pages
Database: Blockchain serves as immutable database
Deliverables Expected
Core System
Private Ethereum blockchain running on Azure server with mining enabled
Smart contract deployed and verified for food traceability
REST API server handling image uploads and blockchain interactions
Consumer web interface for QR code-based product verification
Complete deployment on provided Azure Ubuntu server
Security & Production Readiness
Secure key management using environment variables
Basic monitoring and health check scripts
Automated backup system for blockchain data
SSL certificate configuration (Let's Encrypt)
Basic firewall and security hardening
Documentation
System architecture overview
API documentation with example requests/responses
Deployment guide for maintenance
Basic troubleshooting procedures
Technical Stack Preference
Blockchain: Geth, Solidity, Truffle
Backend: Node.js, Express.js, ethers.js
Frontend: Vanilla HTML/CSS/JavaScript (no complex frameworks)
Storage: Firebase (free tier), Azure server storage
Web Server: Nginx
Project Constraints
Budget: Looking for cost-effective solution
Timeline: Need complete system operational within 2-3 weeks
Scalability: System designed for low transaction volume (15/week)
Maintenance: Should be simple to maintain with basic technical knowledge
Success Criteria
Farmers can upload harvest data + images via simple interface
All data gets stored immutably on private blockchain
Consumers can scan QR codes to view complete product journey
System provides cryptographic proof of authenticity (like DailyGurus demo)
Ready for production use with basic FSSAI compliance support
Additional Information
I have existing Azure server infrastructure ready
Looking for someone experienced with private blockchain development
System should be production-ready but not enterprise-scale complexity
Priority on reliability and simplicity over advanced features
Please include in your proposal: Estimated timeline, your experience with similar blockchain traceability projects, and approach to ensuring the system is production-ready for a food business launch.
Technical Requirements
Blockchain Infrastructure
Platform: Private Ethereum network using Geth (Go Ethereum)
Consensus: Clique (Proof-of-Authority) for low transaction volume
Server: Deploy on existing Azure Ubuntu server
Expected Volume: Maximum 15 transactions per week (very low volume)
Network: Private blockchain (not public Ethereum)
Smart Contract Development
Language: Solidity
Contract Functions:
addHarvestEvent(batchId, farmerName, location, imageHash)
addProcessingEvent(batchId, processType, qualityReportHash)
getBatchHistory(batchId) - returns complete product journey
Features: Event logging, access controls, immutable data storage
Deployment: Using Truffle framework
Backend API System
Framework: Node.js with Express.js
Blockchain Integration: ethers.js library for smart contract interaction
Image Storage: Firebase Storage integration (free tier)
API Endpoints:
POST /api/harvest - accepts farmer data + image uploads
POST /api/processing - records processing events
GET /api/batch/:batchId - retrieves complete batch history
Security: Environment variables for private keys, CORS enabled
Frontend Consumer Interface
Technology: HTML/CSS/JavaScript with ethers.js
Functionality:
QR code scanning support
Batch ID parameter handling (?batch=ABC123)
Timeline display of product journey
Responsive design for mobile devices
Hosting: Nginx on Azure server with SSL support
System Integration
Web Server: Nginx configuration for static files + API proxy
Mobile App: REST API integration for existing Android app
QR Code Generation: Dynamic QR codes linking to batch pages
Database: Blockchain serves as immutable database
Deliverables Expected
Core System
Private Ethereum blockchain running on Azure server with mining enabled
Smart contract deployed and verified for food traceability
REST API server handling image uploads and blockchain interactions
Consumer web interface for QR code-based product verification
Complete deployment on provided Azure Ubuntu server
Security & Production Readiness
Secure key management using environment variables
Basic monitoring and health check scripts
Automated backup system for blockchain data
SSL certificate configuration (Let's Encrypt)
Basic firewall and security hardening
Documentation
System architecture overview
API documentation with example requests/responses
Deployment guide for maintenance
Basic troubleshooting procedures
Technical Stack Preference
Blockchain: Geth, Solidity, Truffle
Backend: Node.js, Express.js, ethers.js
Frontend: Vanilla HTML/CSS/JavaScript (no complex frameworks)
Storage: Firebase (free tier), Azure server storage
Web Server: Nginx
Project Constraints
Budget: Looking for cost-effective solution
Timeline: Need complete system operational within 2-3 weeks
Scalability: System designed for low transaction volume (15/week)
Maintenance: Should be simple to maintain with basic technical knowledge
Success Criteria
Farmers can upload harvest data + images via simple interface
All data gets stored immutably on private blockchain
Consumers can scan QR codes to view complete product journey
System provides cryptographic proof of authenticity (like DailyGurus demo)
Ready for production use with basic FSSAI compliance support
Additional Information
I have existing Azure server infrastructure ready
Looking for someone experienced with private blockchain development
System should be production-ready but not enterprise-scale complexity
Priority on reliability and simplicity over advanced features
Please include in your proposal: Estimated timeline, your experience with similar blockchain traceability projects, and approach to ensuring the system is production-ready for a food business launch.