Blockchain Engineer

Key Responsibilities:

Develop and integrate support for public blockchains (e.g., Ethereum, Bitcoin, Cosmos, Solana, TON).

Maintain and optimize blockchain modules for transaction scanning, broadcasting, and fund consolidation.

Design and enhance wallet functionalities, including deposit/withdraw flows, cold/hot wallet operations, and MPC/HD wallet management.

Implement secure transaction signing workflows using hardware modules (e.g., CloudHSM) and cryptographic algorithms (ECDSA, EdDSA).

Develop robust backend services using Java, Go, or Node.js with frameworks like Gin, Spring Boot, or Gorm.

Create and maintain scalable APIs and scheduled tasks to monitor blockchain activity and manage asset flows.

Standardize interaction with account- and UTXO-based blockchains using unified RPC layers.

Develop chain-agnostic SDKs and utilities to streamline wallet and DApp integration.

DevOps & Infrastructure:

Participate in CI/CD pipelines, containerization (Docker), and deployment automation to ensure secure and reliable code delivery.

Requirements:

Proficient in Java, Go, Python, or Node.js.

Strong understanding of blockchain principles, including consensus, wallets, transaction structures, and smart contracts.

Experience with Solidity, Hardhat, Foundry, and blockchain debugging/testing frameworks.

Familiarity with wallet standards such as BIP32/39/44, HD wallet structures, and MPC protocols.

Skilled with SQL/NoSQL databases like MySQL, PostgreSQL, Redis, MongoDB, and LevelDB.

Experience with multi-chain wallet systems, chain integration, and node interaction.

Familiarity with cryptographic techniques used in Web3: hashing, digital signatures, key management, etc.

Experience with Docker, CI/CD pipelines, and Linux-based deployment environments.

Prior experience working on enterprise-grade wallet platforms like Kcash or OneStep Wallet.

Exposure to DeFi, NFTs, or decentralized identity frameworks.

Strong problem-solving skills, attention to detail, and ability to work in fast-paced, collaborative environments.