Blockchain Developer – On-Chain Contribution Certificates, NFT/SBT

Job Description:

• Develop the MVP for an on-chain certificate system for Roxonn contributors:
• Design and implement a smart contract (e.g., ERC1155, custom SBT, or non-transferable ERC721) on the XDC Network for minting and managing these certificates.
• Define and structure the metadata for certificates (e.g., contributor ID, achievement details, project link, date, skills demonstrated).
• Consider storage solutions like IPFS/Arweave for off-chain metadata parts.
• Develop backend logic (Node.js/TypeScript) to trigger the minting of certificates based on defined criteria (for MVP, this might be a manual admin trigger for verified achievements).
• Implement frontend components (React/TypeScript) to display earned certificates on a contributor's Roxonn profile.
• Ensure the system is secure and gas-efficient.

Requirements:

• Strong experience in Smart Contract development with Solidity (preferably for XDC/EVM-compatible chains).
• Experience with NFT/SBT standards (ERC721, ERC1155, or emerging SBT patterns).
• Backend development experience (Node.js/TypeScript) for Web3 integrations.
• Frontend development experience (React/TypeScript) with Web3 libraries (e.g., ethers.js, web3.js).
• Understanding of metadata standards and storage solutions (e.g., IPFS, Arweave).
• Familiarity with blockchain security best practices.
• Knowledge of the XDC Network ecosystem is a plus.

Benefits: