Senior Blockchain Developer

DXC Luxoft Financial Services is partnering with a leading UK financial institution to deliver cutting-edge Digital Asset and Web3 solutions. We're looking for an experienced Senior Blockchain Developer to help design and build enterprise-grade digital asset platforms, working at the intersection of traditional finance and blockchain technology. This is an opportunity to contribute to tokenization, digital custody, smart contracts, and next-generation financial infrastructure within a highly collaborative global team.

Key Responsibilities

• Design, build and deploy Web3 components including smart contracts, wallet integrations, protocol connectors and event listeners

• Develop backend services using Java/Spring and Node.js to integrate with public and permissioned blockchain networks

• Write, test and optimise Solidity smart contracts with a focus on security, reliability and gas efficiency

• Build event-driven solutions to manage transaction lifecycles, on-chain events and state synchronisation

• Support tokenization, digital custody and DeFi/TradFi integration initiatives

Required Experience

• Strong commercial experience delivering blockchain and Web3 solutions

• Hands-on Solidity development experience including smart contract design, testing and deployment

• Experience with Hardhat, Foundry, Truffle or similar blockchain development frameworks

• Strong knowledge of Web3J, Ethers.js, Web3JS, Viem or related blockchain SDKs

• Strong backend development skills using Java/Spring and/or Node.js

• Experience designing APIs, microservices and scalable distributed systems

• In-depth understanding of blockchain fundamentals, including consensus mechanisms, transaction lifecycles and gas models

• Knowledge of wallet infrastructure, private key management and blockchain security principles

• Experience with ERC-20, ERC-721, ERC-1155 and tokenization frameworks

• Strong understanding of event-driven architectures and asynchronous processing

• Experience with Kafka, RabbitMQ or similar messaging technologies

• Knowledge of cryptographic principles including digital signatures, hashing and PKI

• Experience with Docker, Kubernetes, Helm, Jenkins, Git and CI/CD practices

Desired Experience

• Digital asset custody platforms

• DeFi and TradFi integration projects

• Tokenization and blockchain-based financial products

• Hyperledger Besu

• Canton

• Solana

• Layer 2 technologies including Polygon, Optimism and zkSync

• Cross-chain interoperability solutions

• Financial Services or Capital Markets experience