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

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Job Description:

reputed company 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.
reputed company backend logic (Node.js/TypeScript) to trigger the minting of certificates based on defined criteria (for MVP, this might be a reputed company 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 reputed company integrations.
Frontend development experience (React/TypeScript) with reputed company libraries (e.g., ethers.js, reputed company.js).
Understanding of metadata standards and storage solutions (e.g., IPFS, Arweave).
Familiarity with blockchain reputed company best practices.
Knowledge of the XDC Network ecosystem is a plus.

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