About This Role
This Blockchain Developer role at Citi Bank involves designing, developing, and deploying Web3 components and integrations for the bank's Digital Asset Platform. The work includes smart contracts, blockchain integrations, wallet solutions, and digital asset infrastructure, and suits an experienced developer with a strong security mindset and excellent problem-solving skills.
Responsibilities
- Build and integrate Web3 components, smart contracts, and blockchain protocols
- Develop backend services connecting to public and permissioned blockchain networks
- Build, test, and audit secure and gas-efficient smart contracts
- Implement event-driven architectures for on-chain events and transaction lifecycle management
- Support digital asset custody, tokenization, and DeFi/TradFi integrations
- Collaborate with architects and senior engineers on scalable and secure Web3 infrastructure
- Participate in code reviews, testing, documentation, and Agile/Scrum delivery
Requirements
- 10+ years of experience
- Blockchain / Web3 development
- Solidity Smart Contracts
- Ethereum / Hyperledger Besu / Corda or equivalent
- Java / Spring or Node.js
- Web3J / Web3JS / Ethers.js / Viem
- Smart contract testing
- Hardhat / Foundry / Truffle
- Blockchain fundamentals: consensus, transactions, gas, and wallet infrastructure
- ERC-20 / ERC-721 / ERC-1155 / ERC-3525
- Event-driven architecture / Asynchronous programming
- Kafka / RabbitMQ
- Docker / Kubernetes / CI/CD
- Cryptography: digital signatures, hashing, PKI, and key management
- Git / Jira / Jenkins / Helm
- Strong Web3 engineering and backend development background
- Strong security mindset and knowledge of smart contract vulnerabilities
- Excellent problem-solving and communication skills
- Strong understanding of APIs, microservices, data structures, and design patterns
- Ability to work effectively with global, distributed engineering teams
Nice to have:
- Hyperledger Besu / Fabric / Corda / R3
- Layer 2 Polygon / Optimism / zkSync
- Cross-chain interoperability
- Digital asset custody
- Tokenization / DeFi / TradFi
- Financial services / Regulated industry experience
- Agile / Scrum
Application Process
- Share your updated resume
- Work authorization
- Current location
- Availability
