Java Developer React

Job Description Java Developer React Location - London On-Prem 3 Days per Week Cobalt Streamworks is looking for a talented Java Developer with React experience to join our team delivering cutting-edge Front Office solutions within Global Markets environments. You will play a key role in designing and enhancing regulatory, alerting, and sales enablement platforms , directly supporting front-office users and business stakeholders across capital markets. This is an exciting opportunity to work on high-impact, real-time applications in complex trading environments, collaborating with both business and technical teams to drive innovation and performance. You will be part of a Front Office technology ecosystem supporting Global Markets activities, working on advanced sales and trading tools used by front-office teams. The role operates within a distributed, agile delivery model , collaborating closely with: Business stakeholders (sales & trading) Application support teams QA and testing teams Distributed development teams across Europe and globally You will contribute to the development of modern, scalable applications used in fast-paced, business-critical environments. Key Responsibilities Design, develop and maintain front-office sales tools and associated applications Contribute across the full software development lifecycle (analysis, design, development, testing, deployment, and support) Build and enhance high-performance, low-latency applications Develop RESTful APIs and modern web interfaces (React) Collaborate closely with business stakeholders to understand requirements and deliver value-driven solutions Work alongside production support teams to ensure smooth releases and operational stability Provide 3rd line support and assist in troubleshooting production issues Participate in code reviews and continuous improvement initiatives Skills & Experience (Required) Strong experience in Java (server-side development) Experience building web-based applications and REST APIs Solid experience with JavaScript frameworks, particularly React Good understanding of application performance and optimisation Excellent communication skills, both written and verbal Ability to operate effectively in agile, collaborative environments Experience with relational databases and SQL Exposure to investment banking or capital markets environments Experience with multi-threaded and distributed systems Familiarity with CI/CD tools (Jenkins, TeamCity) and deployment tools (Ansible) Knowledge of front office trading systems (FX, Rates, Credit, or derivatives) Experience with monitoring and observability tools Strong problem-solving mindset with a proactive approach Additional Information #Cobalt StreamworksUK