QuackAI, as an AI-centric company, is likely seeking a Backend Engineer to integrate advanced blockchain capabilities, specifically Solana, into their innovative projects, such as enhancing decentralized exchange (DEX) functionality with potential AI-driven features. The recruitment emphasis on performance optimization and on-chain data suggests a need for high scalability and efficiency in their DeFi offerings, indicating a forward-thinking approach to position themselves in a competitive market. This role underscores QuackAI's intent to build robust backend systems that leverage AI and blockchain synergistically, possibly for applications in intelligent trading or data analysis within the Web3 ecosystem.