Senior Web3 Full-Stack Engineer

About the Project:

We are building a decentralized Web3 lottery platform powered by smart contracts and transparent on-chain mechanics. The system combines blockchain logic, backend services, and a modern web interface to ensure secure ticket processing, verifiable randomness, and automated prize distribution.

We are looking for a Senior Web3 Full-Stack Engineer who will take ownership of the technical architecture across blockchain, backend, and frontend layers.

Responsibilities:

• Design, develop, and deploy secure smart contracts in Solidity
• Implement lottery mechanics, prize pool management, and verifiable randomness
• Build and maintain backend services using Node.js (NestJS)
• Design APIs and integrate on-chain logic with PostgreSQL and Redis
• Contribute to Web3 integration within a Next.js (React) frontend
• Ensure security best practices across contracts and backend systems
• Optimize gas usage and system performance
• Implement automated testing for smart contracts and backend services
• Participate in architectural decisions and production releases

Requirements:

• 5+ years of software engineering experience
• 3+ years of blockchain development experience
• Strong Solidity expertise and deep understanding of EVM
• Experience with Hardhat or Foundry
• Strong backend experience with Node.js and NestJS
• Experience working with PostgreSQL and Redis
• Experience integrating smart contracts with backend APIs
• Understanding of frontend integration using React / Next.js
• Experience building and maintaining production systems
• Strong understanding of smart contract security patterns

Nice to Have

• Experience with Chainlink VRF or oracle integrations
• Experience building gaming, lottery, or high-transaction systems
• Experience with Layer 2 networks
• Experience preparing contracts for external security audits
• Understanding of tokenomics and incentive models