Blockchain Developer

Job Summary:

Blockchain Developer

Key Responsibilities:

1. Wallet Development:

• Build and maintain

  multi-chain crypto wallets

  (hot/cold) with features like balance tracking, private key encryption, address generation.
• Integrate support for BTC, ETH, ERC-20, BSC, TRC-20, Polygon, etc.
• Implement secure wallet recovery and backup solutions (mnemonics, hardware wallet support)

2. Stock Market Integration:

• Integrate stock market APIs (e.g., Alpaca, Polygon.io, Interactive Brokers) for live data, portfolio management, and trade execution.
• Implement user KYC/AML workflows and trading dashboards.
• Build scalable modules for

  stock ETF/F&O/Intraday order routing and settlement

  logic.

3. Wallet Exchange Platform:

• Develop or integrate crypto exchange functionalities (swap, order book, P2P, liquidity pools)
• Support fiat on/off ramps via third-party gateways (e.g., Moonpay, Transak)
• Develop internal logic for asset pricing, fee deductions, and tax calculations.

Required Skills:

• Strong proficiency in Solidity, Web3.js, Ethers.js, or Rust (for Solana).
• Experience with blockchain platforms like Ethereum, BSC, Polygon, Tron, etc.
• Proficient in backend languages Node.js, Golang, or Python.
• Familiar with smart contract auditing, security standards, and gas optimization.
• Knowledge of RESTful APIs, GraphQL, Kafka, Docker, Redis, and PostgreSQL.
• Experience working with CeFi/DeFi protocols and integrating third-party APIs.
• Experience with stock trading platforms, brokerage APIs, or algo-trading.
• Knowledge of cryptographic algorithms, zero-knowledge proofs, wallet key management.
• Understanding of compliance frameworks (KYC, AML, PCI DSS).