Blockchain Developer (Smart Contracts)

Hyphenconnect

Hong Kong permanent

Posted: July 23, 2025

Job Description

We are hiring for one of our ecosystem projects in the digital asset space, we are looking for a Blockchain Developer to design, develop, and implement blockchain-based solutions for a high-performance trading system. The ideal candidate will have expertise in blockchain technologies, smart contract development, and trading system architecture, ensuring secure, scalable, and efficient solutions for decentralized trading applications.

Job Description:

• Design and develop blockchain-based trading platforms, including decentralized exchanges (DEX), automated market makers (AMM), or order-book systems.

• Write, test, and deploy secure smart contracts using platforms such as Ethereum, Binance Smart Chain, Solana, or other blockchain networks.

• Integrate blockchain solutions with front-end and back-end systems to enable seamless trading functionality.

• Implement security best practices to protect against vulnerabilities, including reentrancy attacks, front-running, and unauthorized access.

• Optimize smart contracts for gas efficiency and system performance to handle high-frequency trading scenarios.

• Collaborate with cross-functional teams, including traders, product managers, and DevOps engineers, to define system requirements and ensure alignment with business goals.

• Ensure compliance with relevant financial regulations and standards for trading systems.

• Monitor and maintain blockchain nodes, ensuring uptime and reliability of the trading infrastructure.

• Stay updated on emerging blockchain technologies, protocols, and industry trends to enhance system capabilities.

Qualifications:

• Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent experience).

• 3+ years of experience in blockchain development, with a focus on building decentralized applications (dApps) or trading systems.

• Proficiency in programming languages such as Solidity, Rust, or Go for smart contract development.

• Strong understanding of blockchain protocols (e.g., Ethereum, Solana, Polygon) and consensus mechanisms (e.g., PoW, PoS).

• Experience with trading system concepts, including order matching, liquidity pools, or market-making algorithms.

• Familiarity with DeFi protocols, token standards (e.g., ERC-20, ERC-721), and interoperability frameworks.

• Knowledge of cryptographic principles, including public/private key infrastructure and hashing algorithms.

• Experience with tools like Truffle, Hardhat, or Foundry for smart contract development and testing.

• Understanding of front-end and back-end integration (e.g., Web3.js, Ethers.js, REST APIs).

• Strong problem-solving skills and attention to detail in writing secure and efficient code.

• Excellent communication and collaboration skills to work in a fast-paced, team-oriented environment.

Nice to have:

• Experience with layer-2 scaling solutions (e.g., Optimism, Arbitrum) or cross-chain bridges.

• Knowledge of financial markets, trading strategies, or algorithmic trading.

• Familiarity with cloud platforms (e.g., AWS, Azure) and containerization (e.g., Docker, Kubernetes).

• Contributions to open-source blockchain projects or active participation in blockchain communities.

• Understanding of regulatory frameworks for cryptocurrencies and trading platforms (e.g., KYC/AML compliance).

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