Backend Engineer

N

NxT Level

Backend Engineer

New York, NY
Full Time
Paid
  • Responsibilities

    Position: Backend Engineer

    Our client, a rapidly growing eCommerce company, is seeking a Backend Engineer with expertise in Golang and Solidity. This role focuses on building and maintaining robust backend systems for issuance, clearing, settlement, and risk control, while designing and supporting on-chain smart contracts. The ideal candidate has strong Golang experience and hands-on knowledge of Solidity.

    Primary Responsibilities

    • Build and maintain interfaces for on-chain and off-chain interactions (RPC, event listening, cross-chain bridges)

    • Develop financial-grade backend services using Golang, including modules for authentication, clearing, risk control, and payment instruction processing

    • Design, develop, and maintain Solidity smart contracts for stablecoin operations (ERC20 standard, minting/burning, escrow mechanisms)

    • Write unit and security tests for smart contracts, and assist with security audits

    • Develop high-concurrency, highly available backend architectures to handle on/off-chain data synchronization

    • Prepare API documentation and deployment scripts, and contribute to CI/CD pipeline development

    • Troubleshoot production issues such as performance bottlenecks, on-chain confirmation delays, and node synchronization

    • Undertake ad hoc projects to support platform growth

    Core Qualifications

    • 3+ years of hands-on experience in Golang, with experience in frameworks such as Echo, Fiber, or Gin

    • Proficiency in Solidity and understanding of EVM fundamentals, Gas optimization, and smart contract security patterns (e.g., reentrancy, overflow protection)

    • Experience with Ethereum development tools like OpenZeppelin, Hardhat, or Foundry

    • Strong knowledge of MySQL, including database design and performance optimization

    • Experience with Kafka and Redis

    • Knowledge of Docker, Kubernetes, and microservices-based architectures

    Nice-to-Have Qualifications

    • Previous experience building backend systems for stablecoins, DeFi platforms, or cryptocurrency exchanges

    • Understanding of cross-chain technologies such as Wormhole, LayerZero, or CCIP