Full-Stack Engineer (FX Trading Applications)Location: London (onsite 3 days per week)Day Rate: £700 (via Umbrella Company)Contract: Fixed Term Contract until 31 December 2026About the RoleAre you ready to dive into the dynamic world of FX Trading technology? Our client is seeking a talented Full-Stack Engineer with strong Java expertise and a passion for solving complex technical challenges. You''ll play a key role in building mission-critical components that power high-performance trading systems-working closely with cross-functional teams in a fast-paced, agile environment.Key ResponsibilitiesEngineering and DevelopmentDesign and develop backend and frontend features for FX Trading applications.Write well-designed, testable, and efficient code across the full stack.Build automated test suites (unit, integration, contract, UI/API, performance).Define metrics and implement automated evaluation and drift detection for AI-related components.Reduce technical debt while improving modularity, observability, reliability, and performance.Architecture and IntegrationIntegrate software components into cohesive, production-ready systems.Design clear, maintainable API contracts and ensure backward-compatible changes.Optimise low-latency, high-throughput services.Operational ExcellenceTroubleshoot, debug, and enhance existing systems.Instrument services with metrics, logs, and traces for faster incident resolution.Participate in deployments in line with strict change-control ..... full job details .....