Top Tech Jobs & Startup Jobs in London

Design and build scalable AI-powered backend services and APIs in Golang for cloud-native, microservices-based platforms. Develop developer tools, ensure observability, CI/CD, and performance, solve distributed-systems challenges, and mentor engineering teams to deliver production-ready solutions.

Design, develop, test, and deploy Web3 components and backend services for Citi's digital asset platform. Build smart contracts, integrate blockchain networks and wallets, implement event-driven architectures, support custody and tokenization, participate in code reviews, and maintain secure, scalable production-grade Web3 infrastructure within Agile teams.

Design, build, test, and maintain backend Java/Spring services and microservices that integrate with blockchain networks. Implement node connectivity, transaction submission, on-chain event monitoring, wallet interactions, and smart contract deployment. Support async/event-driven processing, production debugging, code reviews, documentation, and Agile delivery while following security and quality standards for enterprise-grade digital asset platforms.

Design, build and deliver backend enterprise web applications for Citi's Digital Assets Platform using Java/Spring and web3/blockchain technologies. Collaborate on solution design, follow best practices for scalability, reliability and performance, document systems, use DevOps and agile tools, and support distributed team delivery.

Senior technology leader accountable for modernizing Markets Finance platforms (booking, settlements, inventory/position, collateral, liquidity/risk). Lead global engineering teams, own architecture for scalable distributed systems, drive CI/CD and cloud-native adoption, define and execute AI engineering strategy, manage delivery and stakeholders, and optimize system performance and resiliency.

Lead global transformation of Citi's Non-Financial Regulatory Reporting by defining strategy, delivering an AI-enabled Regulatory Intelligence Platform, executing a unified Target Operating Model, driving automation and data quality, managing global teams, and ensuring robust governance, risk controls, and senior stakeholder engagement.

Lead and transform Citi's securities settlements technology stack: architect, design, and deliver scalable, low-latency microservices; manage engineering teams; own L3 support, CI/CD, cloud deployments, stakeholder engagement, risk and regulatory compliance, and performance optimization.

Lead development for applications supporting finance desks, overseeing design and delivery of systems focusing on collateral management and optimization.

Lead low-latency systems and application framework engineering for algorithmic trading, focusing on Rust and Java within a high-performance architecture team.