Lead Engineer at Kings of Rings

The role

As Lead Engineer for Kings of Rings, I was responsible for leading and implementing the entire tech stack and infrastructure. Kings of Rings is a Web3 NFT trading-card game on the Polygon network centered on college basketball and football athletes.

What I built

• React Web3 front-end: dynamic React application with wallet integration for players to manage their NFT collections and interact with the game.
• Solidity smart contracts: designed and implemented ERC-1155 NFTs, an NFT marketplace, on-chain staking with rewards, and on-chain sales tax logic, all on Polygon using Hardhat and Ethers.js.
• DAO governance: built off-chain gasless voting with decentralized proposal execution using OSnap and Snapshot, giving the community governance rights without per-vote gas costs.
• Back-end and database: designed database models and back-end services with PostgreSQL on AWS RDS, containerized via AWS ECS with Lambda functions for event-driven processing.
• CI/CD and infrastructure: set up CI/CD pipelines with GitHub Actions, Docker containerization, and Firebase for hosting and auth.

Highlights

• Led the full technical scope: planning and executing the UI, smart contracts, database models, and back-end infrastructure as the sole lead engineer.
• Implemented a DAO with off-chain gasless voting and decentralized execution of proposals via OSnap and Snapshot.
• Delivered ERC-1155 NFTs, an NFT marketplace, staking with rewards, and on-chain sales tax, all on Polygon.

Stack

React · TypeScript · Solidity · Hardhat · Ethers.js · PostgreSQL · AWS Lambda · AWS ECS · AWS RDS · Firebase