Website:
topcrop.in
Job details:
Location: Remote / India
Engagement: Project-Based Contract (6–10 weeks)
Company: TopCrop – Export supply-chain traceability for global agri buyers
About the RoleTopCrop is building a Polygon-based traceability platform for agricultural exports. This is a project-based, delivery-driven contract to build smart contracts + core backend integration for our MVP. If you know how to ship production-ready blockchain systems fast — you’ll fit right in.
What You’ll OwnSmart Contract Development
- Design & implement lifecycle contracts for batches, QC records, and shipment events on Polygon testnet/mainnet.
- Create on-chain mapping for QR codes, IPFS hashes, and verification endpoints.
- Optimize gas + security.
Blockchain & IPFS Integrations
- Implement IPFS pinning for QC documents and metadata (Pinata / n8n).
- Product Requirements Document
- Integrate smart contracts with backend APIs (Hasura/PostgREST).
Backend & API Hooks
- Build webhook triggers for batch.created, qc.completed, and shipment.status_changed events.
- Work with REST/GraphQL API design and business logic.
Testing & Deployment
- Write automated tests (Hardhat).
- Deploy contracts using Infura/Alchemy.
- Support CI/CD and QA pipeline setup.
Qualifications- Strong Solidity experience — deployed real contracts on testnet/mainnet.
- Hands-on with Polygon, Hardhat, IPFS, RPC endpoints.
- Experience integrating blockchain with PostgreSQL, Hasura, REST/GraphQL APIs.
- Clear understanding of gas optimization, security patterns, audit basics.
- Ability to work independently on fast timelines.
Nice to Have- Experience with n8n, Retool, React Admin.
- Previous work on supply-chain or traceability systems.
- Familiarity with QR-based verification flows.
TimelineThis is a project-based contract (approx. 8 weeks, aligned with TopCrop’s development plan). Work is milestone-structured and output-driven.
What We Offer- Competitive project fee (milestone-based).
- Chance to build a real impact product used by global export buyers.
- Opportunity for long-term collaboration after MVP.
Click on Apply to know more.