Top Tech Jobs & Startup Jobs in London

Design, develop, and lead ultra-low-latency risk engine components for cash equities electronic trading. Build real-time pre-trade risk controls, position and exposure systems, messaging and IPC integrations, and high-performance multi-threaded services. Optimize JVM, native code, networking, operating systems, and hardware for microsecond latency. Lead testing, CI/CD, production support, architecture, cross-functional delivery, and globally distributed engineering teams.

Lead the architecture and development of scalable, secure, accessible frontend and fullstack web applications. Establish UI engineering standards, reusable component libraries, design system adherence, API and backend integrations, testing, performance, CI/CD, and security practices. Collaborate with product, UX, backend, infrastructure, and security teams to deliver complex technology initiatives. Provide technical leadership, mentor engineers, resolve complex system challenges, and ensure compliance with enterprise architecture and risk controls.

Lead AI-driven software engineering initiatives by partnering with technology leaders to redesign business processes, develop scalable solutions, write production code, and guide multiple agile teams. The role involves architecture, complex feature delivery, technical mentorship, stakeholder collaboration, adoption of AI reference solutions, and fostering engineering excellence across Citi’s technology community.

Build data analytics tools, frameworks, dashboards, and visualizations for cross-asset stress loss, credit capital, TCE, and regulatory capital management. Investigate data quality, methodology, implementation, and coverage issues; identify stress-loss drivers; and translate insights into actions. Partner with capital management, traders, finance, reporting, program execution, and technology teams while maintaining related GitHub repositories. The role requires strong SQL and Python skills, financial risk-capital expertise, statistical modeling experience, and familiarity with derivatives concepts.

Leads a 50-person HR Total Rewards product engineering organization across autonomous pods and capability teams. Owns product vision, engineering strategy, SaaS portfolio governance, AI-enabled workforce transformation, architecture, delivery standards, budgets, vendor relationships, talent development, and executive stakeholder management. The role requires hands-on technical judgment, including coding, code review, prototyping, AI-generated code validation, cloud-native architecture, security, testing, and platform decisions.

Supports Citi’s Equity Capital Markets and Debt Capital Markets businesses through senior-management presentations, competitor benchmarking, audit and regulatory reviews, compliance initiatives, deal and revenue pipeline management, revenue estimates, budgeting, forecasting, and ad hoc analysis. The role requires strong communication, analytical, organizational, relationship-building, discretion, and Microsoft Excel and PowerPoint skills in a fast-paced capital-markets environment.

Leads full-stack application development for Citi Finance Technology. Responsibilities include designing, coding, testing, deploying, and supporting secure, scalable applications across the full technology stack. The role develops React-based user interfaces, Java and Spring microservices, APIs, cloud and containerized solutions, and automated testing. It contributes to architecture, technical planning, feature prioritization, troubleshooting, risk management, and process improvements while collaborating with enterprise architects, product owners, scrum teams, and global stakeholders.

Leads global Core Trade modernization by defining product vision, operating models, infrastructure roadmaps, governance, and investment plans. Manages product specialists and interdisciplinary teams while coordinating with sales, technology, operations, risk, compliance, and senior stakeholders. Drives digitization, scalability, resilience, client experience, regulatory compliance, and commercial outcomes across a complex global financial services platform.

Provides comprehensive administrative support to senior management and an entire department. Responsibilities include calendar and meeting coordination, travel arrangements, expense reconciliation, invoice processing, document and presentation preparation, supply ordering, reporting, special projects, and coaching administrative staff. The role also requires compliance awareness, risk assessment, strong communication, proficiency with Microsoft Office, and the ability to learn new systems quickly.

Provides comprehensive administrative support to senior management and an entire department. Responsibilities include calendar and meeting coordination, travel arrangements, expense reconciliation, invoice processing, document and presentation preparation, supply ordering, special projects, and training administrative staff. Ensures compliance with applicable policies, laws, and regulations while safeguarding company and client assets.