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# Blockchain Senior Java Engineer - Digital Assets Platform - VP

- **Company:** Citigroup, Inc.
- **Location:** New York, NY, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Code Review, Collaborative Software, Continuous Integration, DevOps, Digital Assets, Digital Signature, Java Platform Enterprise Edition (J2EE), Key Management, Node.Js, Public Key Infrastructure, Scrum Methodology, Queueing Systems, RabbitMQ, Blockchain, Software Engineering, Backend, Event Driven Architecture, Hyperledger, Kubernetes, Ethereum, Solidity, Apache Kafka, Web3.js, Asynchronous Programming, Docker
- **Published:** August 12, 2026
- **Apply:** https://us.experteer.com/career/view-jobs/blockchain-senior-java-engineer-digital-assets-platform-vp-new-york-ny-usa-58918266

## About the Role

_ * Integrate Web3 libraries into enterprise Java and/or Node.js backends * Implement asynchronous, event-driven architectures for on-chain events and state synchronization * Collaborate with architects and senior engineers on scalable, secure Web3 infrastructure * Participate in code reviews to uphold engineering standards * Support custody integrations, tokenization frameworks, and DeFi/TradFi bridging components * Contribute to technical documentation (contracts, integration guides, architecture notes) * Stay current with Web3 ecosystem developments and emerging tooling * Work in Agile/Scrum, participate in sprints and stand-ups within a distributed team * Identify and resolve Web3 stack issues and escalate when needed to meet timelines Tasks * 10-15 years of software engineering experience with strong backend foundation * 3-5 years of hands-on Web3/blockchain development, including smart contracts * 8-12 years of backend development with Java/Spring, Node.js, or equivalent * aaaaaa
Besu, with smart contract testing frameworks (Hardhat, Foundry, Truffle) and security practices * Hands-on experience with Web3 libraries (Web3J, Web3JS, Ethers.js, Viem) * Strong understanding of blockchain fundamentals (consensus, gas, wallets, key management) * Experience with token standards (ERC-20, ERC-721, ERC-1155, ERC-3525 or equivalents) * Familiarity with networks like Hyperledger Besu, Solana, Canton is a plus * Experience with asynchronous programming, event-driven systems, and message queues (Kafka, RabbitMQ) * Familiarity with DevOps, containers (Docker, Kubernetes), and CI/CD * Understanding of cryptography, digital signatures, hashing, PKI, and secure key management * Exposure to Layer 2 scaling and cross-chain interoperability is a plus * Experience in financial services or regulated industries is a plus * Familiarity with Agile/Scrum and distributed collaboration tools Key requirements * medical, dental & vision coverage * 401(k) * life, accident,
and disability insurance * wellness programs * paid time off * paid holidays

## Description

Experteer Overview As a Digital Assets Web3 Engineer at Citi, you will design, build, and deploy Web3-native components for a global digital assets platform. You contribute to tokenization, on-chain settlement, and protocol integrations within a cross-functional team. You bridge decentralized patterns with enterprise-grade software, focusing on secure, scalable infrastructure. This role offers the opportunity to influence Citi's institutional digital finance capabilities and work on cutting-edge Web3 technology at scale. Join a mission-driven team shaping the next era of digital finance. Compensation / Benefits * Design, develop, and deploy Web3 components and integrations (smart contracts, on-chain listeners, wallet integrations, protocol connectors) * Build backend services interfacing with public and permissioned blockchains (e.g., Ethereum, Hyperledger Besu, Canton, Solana) * Develop, test, and audit smart contracts (Solidity or equivalent) with security and gas efficiency in mind * Integrate Web3 libraries into enterprise Java and/or Node.js backends * Implement asynchronous, event-driven architectures for on-chain events and state synchronization * Collaborate with architects and senior engineers on scalable, secure Web3 infrastructure * Participate in code reviews to uphold engineering standards * Support custody integrations, tokenization frameworks, and DeFi/TradFi bridging components * Contribute to technical documentation (contracts, integration guides, architecture notes) * Stay current with Web3 ecosystem developments and emerging tooling * Work in Agile/Scrum, participate in sprints and stand-ups within a distributed team * Identify and resolve Web3 stack issues and escalate when needed to meet timelines Tasks * 10-15 years of software engineering experience with strong backend foundation * 3-5 years of hands-on Web3/blockchain development, including smart contracts * 8-12 years of backend development with Java/Spring, Node.js, or equivalent * Proficiency with smart contract testing frameworks (Hardhat, Foundry, Truffle) and security practices * Hands-on experience with Web3 libraries (Web3J, Web3JS, Ethers.js, Viem) * Strong understanding of blockchain fundamentals (consensus, gas, wallets, key management) * Experience with token standards (ERC-20, ERC-721, ERC-1155, ERC-3525 or equivalents) * Familiarity with networks like Hyperledger Besu, Solana, Canton is a plus * Experience with asynchronous programming, event-driven systems, and message queues (Kafka, RabbitMQ) * Familiarity with DevOps, containers (Docker, Kubernetes), and CI/CD * Understanding of cryptography, digital signatures, hashing, PKI, and secure key management * Exposure to Layer 2 scaling and cross-chain interoperability is a plus * Experience in financial services or regulated industries is a plus * Familiarity with Agile/Scrum and distributed collaboration tools Key requirements * medical, dental & vision coverage * 401(k) * life, accident, and disability insurance * wellness programs * paid time off * paid holidays


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