Top Tech Jobs & Startup Jobs in London

Lead the design, development, and delivery of complex application systems for Citi’s XVA Technology team. Define technical standards, solve high-impact engineering problems, translate business needs into scalable solutions, and ensure quality, security, compliance, and architectural integrity. Mentor engineers and analysts, coordinate technology projects across stakeholders, and apply AI-assisted development tools with rigorous engineering judgment.

Lead development of Citi’s low-latency electronic trading platform, including algorithmic trading, smart order routing, exchange connectivity, dark pool engines, and market data processing. Collaborate with traders, quantitative researchers, infrastructure, QA, and support teams to deliver performance improvements and new trading capabilities. Maintain testing frameworks, monitoring, reconciliation, recovery, Agile practices, and CI/CD processes while supporting globally distributed delivery.

Lead Citi Wealth’s global FX product management function across Private Bank and Consumer Wealth. Define the FX platform strategy and roadmap, oversee digital trading platforms and electronic execution capabilities, and modernize execution, booking, settlement, reporting, collateral, and risk workflows. Manage FX derivatives and margining capabilities, ensure regulatory compliance, build the global product team, and partner with trading, technology, operations, risk, compliance, advisors, and sales teams.

Develop and lead low-latency Rust and Java systems for algorithmic trading, market-data replay, backtesting, and electronic trading platforms. Build and optimize event-sourced microservices achieving 10–100 microsecond response times. Analyze complex processes, design application frameworks, integrate new products, tune performance, and support modernization across technology teams. The role also involves stakeholder communication, technical leadership, mentoring developers, and collaboration on architecture and system specifications.

Build production-grade quantitative trading applications and services for equity derivatives desks. Responsibilities include developing real-time pricing and curve-marking tools, reusable libraries, APIs, AI agents, and desk analytics supporting pricing, signal generation, backtesting, risk analysis, and market insight. Collaborate directly with traders, quantitative analysts, Sales, and Trading teams from concept through production.

Leads the global OTC and ETF Operations Change function, owning strategic roadmaps, complex transformation programs, operational risk, governance, technology investment, client relationships, budgets, and team development. Oversees process redesign, testing, automation, AI initiatives, product development, client implementations, business development, and executive stakeholder engagement. Represents the organization with clients and industry forums while ensuring delivery against time, cost, quality, and control objectives.

Develop and lead ultra-low-latency Java and Rust systems for algorithmic trading within Citi’s High Performance Architectures team. Build event-sourced microservices, market data replay and backtesting utilities achieving 10–100 microsecond response times. Define architectures, tune performance, integrate new products, analyze complex systems, and mentor engineers. Collaborate with senior leaders and end users while supporting modernization across global Markets Technology teams.

Design, develop, and maintain low-latency electronic trading and equities execution systems. Collaborate with traders, quantitative researchers, clients, infrastructure, production support, and QA teams to deliver performance improvements, liquidity integrations, and DMA capabilities. Improve testing frameworks, CI/CD, monitoring, reconciliation, and recovery solutions while applying Agile practices and AI-powered development tools. The role also requires optimizing concurrency and high-throughput architectures and may involve managing small teams.

Summer Analyst supporting Citi’s Research team in London through financial market analysis, industry and macro research, spreadsheet and quantitative model maintenance, database updates, client requests, and analyst meeting support. The 10-week program provides research training and may lead to a full-time 2028 position.

Leads the OTC and ETF derivatives operating model within Investor Services Operations. Owns strategic roadmaps, process design, technology change, transformation programs, operational risk, client relationships, team leadership, budgeting, and business development. Partners with Product, Technology, Legal, Compliance, Risk, Sales, and institutional clients to deliver post-trade operational excellence, automation, and innovation across global functions.