Blockchain Engineer - Custodial Wallet

• Develop and maintain core custodial wallet modules including account management, deposit, withdrawal, sweeping, signing, and transaction broadcasting.
• Integrate multiple blockchain protocols (BTC, ETH, Solana, Tron, Cosmos, etc.) through RPC, SDKs, or in-house solutions to ensure stable and high-availability operations.
• Participate in the architecture and modular design of the wallet system to enhance scalability, reliability, and performance.
• Implement automated monitoring, alerting, and logging systems for full traceability of asset flows.
• Write high-quality, testable code; participate in code reviews and CI/CD processes.
• Collaborate cross-functionally with frontend, DevOps, security, and risk teams to ensure overall system performance and security.

Requirements
• Bachelor’s degree or above in Computer Science, Information Security, or related fields.
• 3+ years of backend development experience, with at least 1 year in blockchain wallet or node integration.
• Proficiency in one or more backend languages (Node.js, Golang, Java, Rust, Python).
• Solid understanding of blockchain architecture, transaction mechanisms, and concepts such as block structure, gas/fees, and nonces.
• Familiarity with microservices, message queues (Kafka / RabbitMQ), caching (Redis), and databases (MySQL / PostgreSQL).
• Strong security awareness with understanding of key management, signing, and permission control.

Nice to Have:
• Experience integrating multi-chain protocols (BTC UTXO, ETH EVM, Solana, etc.).
• Knowledge of MPC, HSM, KMS, or TEE technologies.
• Fluent in English and Chinese, with the ability to collaborate in a global team.
• Only shortlisted candidates will be contacted.