Blockchain Developer (On-Chain Contribution Certificates - NFT/SBT)

This is a remote position.

Job title: Blockchain Developer (On-Chain Contribution Certificates - NFT/SBT) 

Company name: Roxonn 

Job location: Global (Remote) 

Job Type: Pay per task (Bounty) 

Compensation: [100 XDC Tokens] (approx. ₹[625]  at time of posting*)

About the Opportunity:

Roxonn is seeking a skilled Blockchain Developer (or a Full-Stack Developer with strong Web3 experience) to design and implement a system for issuing on-chain contribution certificates (e.g., Soulbound Tokens/SBTs or Non-Fungible Tokens/NFTs) on the XDC Network. This feature will provide our contributors with verifiable, immutable credentials for their achievements on the Roxonn platform, enhancing their on-chain reputation and professional portfolio.

Project Overview: The Roxonn Platform

Roxonn is building a Decentralized Software Organization (DSO) on the XDC Network. Our mission is to revolutionize how software is developed and how talent is rewarded globally. We connect businesses and open-source projects with skilled contributors, using blockchain for transparent funding, task management, and instant crypto-based rewards (XDC and future ROXN tokens). Roxonn aims to create a fair, efficient, and accessible ecosystem for decentralized collaboration.

Task Description (Based on GitHub Issue #9):

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.
  
• (Refer to GitHub Issue #9 for full MVP scope and acceptance criteria).
  

Required Skills:

• 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.
  

About Roxonn:

Roxonn connects GitHub with the XDC blockchain, creating a platform where developers and creators earn cryptocurrency (XDC tokens, and soon ROXN) for their open-source and project contributions. We're proud to be part of the XDC Finternet Accelerator Program at T-Hub, driving innovation in the Web3 space.

Our Unique Approach:

Contribute to impactful open-source projects, showcase your skills to a global audience, build your professional portfolio with verifiable achievements, and get rewarded in cryptocurrency. Exceptional contributors to the Roxonn Platform may be considered for core team roles or ongoing collaborations as we grow.

Platform Information: How Rewards Work

• What is this rewards system? Roxonn rewards contributions with XDC tokens (and soon our native ROXN token), a cryptocurrency earned by completing tasks (bounties) on our platform.
  
• How it works:
  

1. Sign in to the Roxonn platform with your GitHub account (a compatible XDC wallet is auto-created or can be linked).
   
2. Choose a task (like this one, detailed in GitHub Issue #9) from our project.
   
3. Submit your work via a Pull Request on GitHub, linking it to the issue (e.g., "Closes #9").
   
4. Upon review, approval, and merge of your PR, XDC tokens for the bounty are sent directly to your wallet on the Roxonn platform.
   

• What can you do with XDC? Earned XDC tokens are transferable. You can send them to other XDC wallets, use them within the XDC ecosystem, or exchange them for INR/other fiat currencies on platforms that support XDC.
  

Please note: Active engagement on the GitHub issue is the primary way to get started with a bounty.

*INR/USD value estimated based on XDC exchange rate on [12-05-2025]. Actual value may vary due to market fluctuations.