Job ID: 98718055280Posted: 2026-08-03Location: London, England, United KingdomCategory: Technology, Applications Development, ProfessionalCompany: Citi26983950 Lead Web3 Engineer - Digital Assets Platform Discover your future at CitiWorking at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.Job OverviewAn Digital Assets Platform Web3 Engineer must be a highly motivated and proactive hands-on software engineer (Back End, Java Focus), have a proven ability and experience working with web applications in production. The successful candidate will be part of the core team continuing to build our Citi Integrated Digital Assets Platform (CIDAP). The ideal candidate will be a self-driven, proactive, strong enterprise developer and resourceful team player who can comfortably work with a large team of highly motivated individuals within Citi’s larger softwzare engineering network.We are looking for candidates who understand how to build the backend of enterprise-grade web applications. The successful individual should understand the basics of web3 infrastructure, blockchain technology and digital assets, and must be a strong enterprise developer of web applications. Experience and knowledge of web3 application development is a plus.Key ResponsibilitiesDevelop, test, and maintain backend software components and services that integrate with blockchain networks and digital asset infrastructureImplement blockchain integrations — including node connectivity, transaction submission, on-chain event monitoring, and wallet interactions — using enterprise Java and Web3 librariesWrite, test, and deploy smart contracts in Solidity or equivalent languages, following established security and quality standardsBuild and maintain APIs and microservices that expose blockchain functionality to upstream platform consumers and business applicationsImplement asynchronous and event-driven processing to manage transaction lifecycle, on-chain state changes, and blockchain data synchronizationParticipate actively in code reviews, contributing constructive feedback and maintaining high standards of code quality, readability, and test coverageCollaborate with architects, senior engineers, and product teams to understand requirements and translate them into well-structured, maintainable software solutionsContribute to technical documentation including component design notes, API specifications, and integration guidesSupport debugging, troubleshooting, and resolution of issues across the blockchain software stack in development and production environmentsFollow and contribute to engineering best practices, coding standards, and Agile delivery processes within the teamStay informed of developments in the blockchain and Web3 ecosystem, including protocol updates, new tooling, and emerging standards relevant to the platformParticipate in sprint ceremonies — planning, stand-ups, reviews, and retrospectives — as part of an Agile/Scrum delivery teamQualifications/ ExperienceBachelor’s degree in CS or Engineering; MS or PhD in computer science, or related discipline a plusExtensive experience in full software development and testing lifecycle. Experience from financial services industry is a plus.Proven experience and expertise with Backend web development with Java springSolid experience in web3 application development is a plusSolid experience and expertise developing web applications using asynchronous programming and communicationExperience and expertise developing web applications adhering to best practices and patterns for reliability, scalability, and performanceFamiliarity with web3 libraries like Web3J and Web3JS is a plusFamiliarity with common and best practices for web3 applications is a plusFamiliarity of Solidity code and best practices is a plusFamiliarity of basics of DevOps and containerize applications is a plusFamiliarity of Agile Methodology and Scrum is a plusCompetencies / SkillsBlockchain Development Proficiency: Practical, hands-on ability to develop software that interacts with blockchain networks — from smart contract deployment to on-chain/off-chain data integrationStrong Software Engineering Fundamentals: Solid command of data structures, algorithms, design patterns, and software development best practices, with the ability to write clean, testable, and maintainable codeSecurity Awareness: Understanding of common smart contract vulnerabilities and secure coding practices relevant to on-chain deployments in a regulated environmentCollaborative Team Player: Works effectively within a distributed, cross-functional team; communicates clearly and proactively with peers, leads, and stakeholdersAttention to Detail: Rigorous and methodical approach to testing, code quality, and documentation — especially critical given the immutable nature of blockchain deploymentsCuriosity & Learning Agility: Genuine interest in blockchain and Web3 technologies, with the drive to continuously learn and apply new tools, protocols, and patternsDelivery Commitment: Reliable and accountable in managing personal workstreams, meeting sprint commitments, and producing quality output within agreed timelinesTooling Familiarity: Working knowledge of standard engineering tools including Git, Jira, Jenkins, Docker, Hardhat/Foundry, and relevant observability platformsDevelopment ValueAs a Blockchain Software Developer on the Citi Integrated Digital Assets Platform, you will:Gain hands-on experience building production-grade blockchain software at the scale and complexity of one of the world's largest financial institutionsDevelop deep expertise across both blockchain-native and enterprise software engineering disciplines, positioning yourself as a highly versatile and sought-after technologistWork on meaningful, real-world use cases in institutional digital finance — including tokenized assets, digital cash, programmable settlement, and on-chain financial infrastructureCollaborate with and learn from experienced engineers, architects, and domain experts who are at the cutting edge of digital asset technologyAccess continuous learning and development opportunities, including exposure to emerging blockchain protocols, internal innovation initiatives, and cross-functional technology programsBuild a strong professional network across Citi's global technology and business community, with growing visibility as you develop your career within the firmDevelopment Value:You will gain significant experience of the technologies and businesses and engineering groups across Citi, giving you exposure to new and existing methodologies and systems as well as the opportunity to work with multiple teams around the globe. As a member of the Citi Integrated Digital Assets Platform engineering team, you will have to opportunity to work with a team of highly motivated, T-shaped, smart individuals who think out of the box and look for disruptive opportunities for commercial benefit.Exposure to newly released and upcoming technologies and the ability to positively contribute to the strategies of the business. By working within the senior leadership team you will be highly visible across Citi and will have access to Citi’s executive management team.This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.What we’ll provide youBy joining Citi London, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:27 days annual leave (plus bank holidays)A discretional annual performance related bonusPrivate Medical Care & Life InsuranceEmployee Assistance ProgramPension PlanPaid Parental LeaveSpecial discounts for employees, family, and friendsAccess to an array of learning and development resourcesVisit our Global Benefits page to learn more.Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive.#LI-AP2------------------------------------------------------Job Family Group: Technology------------------------------------------------------Job Family:Applications Development------------------------------------------------------Time Type:Full time------------------------------------------------------Most Relevant Skills Please see the requirements listed above.------------------------------------------------------Other Relevant Skills For complementary skills, please see above and/or contact the recruiter.------------------------------------------------------Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi.View Citi’s EEO Policy Statement and the Know Your Rights poster.
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