IT & Software

Lead Web3 Engineer - Digital Assets Platform

Citigroup

London · Greater London · United Kingdom

Overview

In this role, you will lead backend development for Citi’s Integrated Digital Assets Platform, building enterprise-grade Web3 solutions that connect to blockchain networks. You’ll work with a large, cross-functional team to deliver scalable, secure APIs and services, while integrating wallets, nodes, and on-chain events. You’ll shape architecture, contribute to smart contract development, and stay ahead of blockchain developments. This is a hands-on, impact-driven position at scale in a leading financial institution.

Pay / Benefits
  • 27 days annual leave (plus bank holidays)
  • Discretional bonus
  • Private Medical Care & Life Insurance
  • Employee Assistance Program
  • Pension Plan
  • Paid Parental Leave
Responsibilities
  • Develop, test, and maintain backend components and services integrating with blockchain networks
  • Implement blockchain integrations including node connectivity, transaction submission, and wallet interactions
  • Develop APIs and microservices exposing blockchain functionality to platform consumers
  • Implement asynchronous/event-driven processing for transaction lifecycle and data synchronization
  • Participate in code reviews and maintain high standards of quality and test coverage
  • Collaborate with architects, engineers, and product teams to translate requirements into maintainable solutions
  • Contribute to technical documentation like design notes and API specs
  • Support debugging and issue resolution across blockchain stack in development and production environments
  • Follow engineering best practices and Agile delivery processes
  • Stay informed of blockchain/Web3 developments and participate in Agile/Scrum ceremonies
Key requirements
  • Bachelor’s degree in CS or Engineering; MS/PhD a plus
  • Extensive experience in full software development and testing lifecycle
  • Proven backend web development with Java Spring
  • Solid experience in web3 application development (a plus)
  • Experience with asynchronous programming for web applications
  • Familiarity with web3 libraries like Web3J and Web3JS (a plus)
  • Familiarity with Solidity and DevOps basics (a plus)
  • Experience with agile methodology and Scrum (a plus)
  • Collaborative team player
  • Attention to detail
  • Curiosity and learning agility
  • Java Spring backend development
  • Web3/Web3J/Web3JS
  • Solidity smart contracts (basic familiarity)

Reference: WJ-747_30138567

Apply now

Continue on the employer's official application - the same link they use for every candidate.

More jobs

This role is listed on GigBlows for discovery and search. Hiring decisions and applications are handled by the employer or their chosen application system.