Job Responsibilities:

1. Design and develop backend systems for decentralized exchanges (DEX).

2. Develop and optimize smart contracts using Solidity (Ethereum, BSC) and Rust (Solana Anchor framework).

3. Integrate DeFi protocols, including swap, liquidity pools, staking, yield farming, and other functionalities.

4. Optimize gas fees, enhance the security of smart contracts, and prevent vulnerabilities such as reentrancy attacks and flash loan attacks.

5. Build and maintain backend services using Golang and/or Node.js to handle transactions and off-chain data.

6. Design Web3 APIs, WebSocket, and gRPC to facilitate communication between the frontend and the blockchain.

7. Utilize Oracle services and indexing tools (such as The Graph, Moralis) to process blockchain data.

8. Deploy and maintain services using AWS/GCP cloud services, Kubernetes, and Docker.

9. Collaborate with frontend and blockchain teams to optimize system performance and user experience.

10. (If applicable) Develop cross-chain solutions to achieve interoperability between blockchains such as Ethereum and Solana.