1 month ago
London, United KingdomStaff+
Responsibilities
- Develop, test, and maintain backend software components and services integrating with blockchain networks and digital asset infrastructure.
- Implement blockchain integrations including node connectivity, transaction submission, on-chain event monitoring, and wallet interactions using Java and Web3 libraries.
- Write, test, and deploy smart contracts in Solidity or equivalent languages.
- Build and maintain APIs and microservices exposing blockchain functionality to platform consumers and business applications.
- Implement asynchronous and event-driven processing for transaction lifecycles, on-chain state changes, and blockchain data synchronization.
- Participate in code reviews and maintain standards for code quality, readability, and test coverage.
- Collaborate with architects, engineers, and product teams to translate requirements into maintainable software solutions.
- Create technical documentation including component design notes, API specifications, and integration guides.
- Debug, troubleshoot, and resolve issues across the blockchain software stack in development and production.
- Participate in Agile delivery processes and sprint ceremonies.
- Stay current with blockchain and Web3 protocols, tooling, and emerging standards.
Requirements
- Bachelor’s degree in computer science, engineering, or a related discipline is required; a master’s or PhD is a plus.
- Extensive experience across the full software development and testing lifecycle.
- Proven backend web development expertise with Java and Spring.
- Experience developing production web applications using asynchronous programming and communication.
- Experience building reliable, scalable, and performant web applications using software engineering best practices and design patterns.
- Practical ability to develop software interacting with blockchain networks, including smart contract deployment and on-chain/off-chain data integration.
- Strong knowledge of data structures, algorithms, design patterns, clean code, testing, and maintainable software.
- Understanding of smart contract vulnerabilities and secure coding practices.
- Familiarity with Web3J, Web3JS, Solidity, Docker, Git, Jira, Jenkins, Hardhat, Foundry, and observability platforms is beneficial.
- Financial services experience, Web3 application development experience, DevOps knowledge, and Agile/Scrum familiarity are beneficial.
Benefits
- Hybrid working model with up to 2 days working from home per week in Citi London.
- 27 days of annual leave plus bank holidays.
- Discretionary annual performance-related bonus.
- Private medical care and life insurance.
- Employee assistance program, pension plan, and paid parental leave.
- Employee discounts and access to learning and development resources.
About Citi
Citi's mission is to serve as a trusted partner to our clients by responsibly providing financial services that enable growth and economic progress. Our core activities are safeguarding assets, lending money, making payments and accessing the capital markets on behalf of our clients. We have over 200 years of experience helping our clients meet the world's toughest challenges and embrace its greatest opportunities. We are Citi, the global bank – an institution connecting millions of people across hundreds of countries and cities. For information on Citi’s commitment to privacy, visit on.citi/privacy.