Java Developer

Java Developer

Location: Belfast

Work Model: Hybrid

Experience: Mid–Senior Level

Role Summary

Citi is looking for an experienced Java Developer to join its technology team in Belfast. The role involves developing and enhancing high-performance applications and APIs supporting critical financial technology platforms.

Key Responsibilities

• Design, develop and maintain applications using Java / Spring Boot
• Develop and integrate REST APIs
• Build scalable microservices
• Implement caching strategies and performance optimisation
• Analyse and resolve performance and production issues
• Work on multithreading, concurrency and high-volume applications
• Write clean, testable and maintainable code
• Collaborate with architects, developers, QA and business teams
• Support applications in production and troubleshoot technical issues

Essential Skills

• Strong Java development experience
• Spring Boot / Microservices
• REST API development
• Caching technologies
• Performance optimisation
• Multithreading & concurrency
• SQL / relational databases
• Linux/Unix