Develop an MVP for issuing on-chain contributor certificates as NFTs or Soulbound Tokens on the XDC Network. Responsibilities include smart contract design, certificate metadata modeling, IPFS or Arweave integration, backend minting logic with Node.js and TypeScript, and React frontend components. The developer must prioritize security, gas efficiency, and Web3 integration, with an initial manual administrator trigger for verified achievements.

Implement a responsive social-sharing feature for Roxonn’s Web3 platform. Add an achievement prompt after users claim rewards, pre-fill customizable social posts for platforms such as Twitter and LinkedIn, and optionally create shareable achievement cards. The role requires collaboration through GitHub, API integration where needed, and strong attention to UI/UX.