Java Developer - Full Stack (Java 21 / React.js) Location: London (Hybrid - 3 days onsite) Contract: 6-Month Contract with high potential for extension (Inside IR35 via Umbrella) Day Rate: CompetitiveClient: Our client is a leading global financial institution with a strong presence in capital markets. They offer a stable, collaborative environment with a focus on trading, risk management, and derivatives. The firm combines global reach with innovative technology to support its front-office operationsYou''ll play a key role in building full-stack solutions using Java 21 and React.js, collaborating closely with traders, risk managers, and quant teams in a dynamic and fast-paced environment.What You''ll Do:Build robust front-to-back trading and risk systems using Java 21 and React.jsWork across teams (Trading, Risk, Quants, DevOps) to deliver scalable solutionsFocus on performance, maintainability, and reliability from day oneEnhance CI/CD pipelines and development processesSupport production environments (Level 3 support)What You Bring:Strong Java (streams, lambdas, concurrency) and front-end skills with React.jsDeep knowledge of multithreaded, distributed systems and asynchronous architectureExperience with JVM tuning and observability tools (Prometheus, Elastic, etc.)TDD, CI/CD, and agile delivery experienceAbility to deliver from design to deploymentBonus Points:Experience in Front Office, Risk, or Pricing within investment bankingKafka, GRPC, Docker/Kubernetes, ..... full job details .....