Top Tech Jobs & Startup Jobs in London

Develop, optimize, and maintain high-performance C#/.NET applications for equity derivatives technology risk. Design scalable systems, write comprehensive unit tests, profile and resolve performance bottlenecks, integrate messaging and web technologies, and collaborate with global teams on large, complex financial projects.

Build and operate production-grade, low-latency Go microservices and developer tools for enterprise-scale AI platforms. Design distributed systems, integrate secrets and identity, implement observability and CI/CD, mentor engineers, and deliver scalable APIs and infrastructure to support LLM-powered applications.

Build production-grade, scalable React/TypeScript front-end applications and component libraries for AI-powered products. Architect client-side systems, optimise performance and accessibility (WCAG), establish testing and CI/CD practices, integrate APIs and real-time data, and mentor other engineers to deliver polished, enterprise-grade user experiences.

Lead design and deliver scalable XVA risk software, embed AI/ML and Generative AI into workflows, own projects end-to-end, drive architecture and Agile delivery, ensure regulatory compliance, and mentor engineering teams.

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.

Design, build, and operate production-grade, AI-native systems and agentic workflows. Integrate LLMs into observability, incident response, and developer tooling; maintain CI/CD, IaC, and GitOps; coach teams on AI engineering and ensure compliance within a regulated financial environment.

Lead Citi's AI-First PDLC, defining enterprise capability models, process governance, and AI-enabled standards. Oversee process mapping, AI-augmented LEAN assessments, stakeholder engagement, and build a global team to ensure audit-ready, controlled, and optimized AI-enabled operations.

Designs and implements ultra-low-latency FX payments and trading systems, partnering with trading and quant teams. Drives architecture, develops and renovates systems, troubleshoots across software/hardware/networks, documents procedures, and defines best practices to improve delivery quality.

Develop tooling for Citi's developer community using Java and SpringBoot. Engage in all SDLC phases and serve as a trusted consultant, enhancing developer experience and fostering continuous learning.