Senior Java Developer

Senior Java Developer My customer is actively hiring a talented & eager Senior Java Developer to join their growing & dynamic team. The successful candidate will be responsible for designing, developing, and maintaining Java-based applications, contributing to the full software development lifecycle from concept to deployment and beyond. This role is ideal for a passionate and seasoned Senior Java Developer looking to further their career in a challenging and rewarding environment. Role Overview You will work on in-house systems, APIs, client reporting and web portal, as well as customising our third-party trading system. You will translate complex business requirements into scalable, high-quality software solutions. This is an opportunity to deepen your expertise in a capital markets environment as a Senior Java Developer while taking on team leadership and mentoring responsibilities — with direct exposure to cloud-native infrastructure, advanced Java development, AI and a highly collaborative engineering culture. Key Responsibilities * Design, develop and maintain in-house systems, APIs, reporting tools and the client web portal * Customise and extend third-party trading systems to meet business requirements * Write clean, well-tested code following SOLID principles, Design Patterns and Clean Code practices * Apply TDD and BDD methodologies; maintain test coverage using JUnit, Spock and Mockito * Participate in code reviews and contribute to continual improvement of engineering standards * Manage and mentor a team of Java (and other) developers, supporting growth and career development * Liaise with various stakeholders (IT and Business) to understand requirements and propose solutions to senior stakeholders Essential * 6+ years' Java development experience at a Financial Services company * Java 11+, Spring/Spring Boot, multi-threading, profiling, performance tuning, RMI * Capital Markets knowledge or similar * Experience in high-quality software practices: TDD, Agile, automated builds/deployments * Strong knowledge of CI build and deployment management tools * Experience with test frameworks (JUnit/Spock) and mocking libraries (e.g. Mockito) * Proficiency with Git and Maven Senior Java Developer