Senior Java Developer

Our client is seeking a talented Senior Java Developer to join our engineering team and play a central role in building and evolving our post-trade technology platform. You will work on in-house systems, APIs, client reporting and web portal, as well as customising our third-party trading system. Working closely with Client Services and Product Management, 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 while taking on mentoring responsibilities, with direct exposure to cloud-native infrastructure, advanced Java development, AI and a highly collaborative engineering culture.

• Design, develop and maintain in-house systems, APIs, reporting tools and the client web portal
• Use AI in the SDLC process
• 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

• Liaise with Client Services and Product Management to understand requirements and propose solutions
• Communicate clearly with IT professionals and non-technical stakeholders at all seniority levels
• Break down complex problems, identify root causes and prioritise resolution effectively

• Mentor a team of Java (and other) developers, supporting growth and career development
• Drive a culture of quality, ownership and continuous improvement within the team
• Work alongside offshore developers as needed, maintaining clear communication across time zones

• 7+ years' Java development experience at a financial services company
• Java 11+, Spring/Spring Boot, multi-threading, profiling, performance tuning, RMI
• Capital markets knowledge (e.g. post-trade or brokerage services)
• 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
• Microservices knowledge
• Understanding and application of SOLID, Design Patterns, Clean Code and TDD
• Able to work and communicate effectively with IT professionals and end users at all levels
• Able to liaise with the business to understand requirements and present solutions clearly
• Able to take complex issues, identify root causes and prioritise resolution

• Experience leading a team of developers
• Working knowledge of Groovy, FpML, FIX, FIXML, JSON, REST, Message Queuing
• Experience building client reporting and web portals
• Experience working with global teams

• Cloud platforms (AWS, Azure or GCP)
• Microservices and event-driven architectures
• Infrastructure as Code (Terraform)
• API design and integration patterns

• CI/CD tool chains (Git Hub, Azure Dev Ops, Jenkins)
• Automated testing and TDD/BDD
• Observability, monitoring and incident response

• Secure SDLC and shift-left security practices
• Data privacy and regulatory compliance
• Identity, access management and zero-trust

• AI/ML tooling and LLM integrations
• Developer productivity tooling and automation
• Platform engineering and developer experience

• Post-trade services and collateral management
• Derivatives across OTC and exchange-traded markets
• Client presentations and prospect engagement

• Fully cloud-based infrastructure
• AI services integration
• Modern developer tooling and automation

• Competitive base salary with performance-related bonus
• Remote working
• Private healthcare, pension, life assurance and critical illness insurance
• A leadership team that values engineering as a core business differentiator

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