Java Developer, Officer

Citigroup

📍 Belfast, United Kingdom, United Kingdom

Full-time other-general Posted February 26, 2026

Job Description

We are looking for a highly skilled and experienced Senior Java Developer to join our engineering team. The ideal candidate will be responsible for designing, developing, and maintaining high-performance, scalable, and resilient applications using modern Java technologies. This role requires strong technical expertise, a passion for problem-solving, and the ability to contribute significantly to our product development lifecycle, from concept to deployment. The Senior Java Developer will also mentor junior team members and contribute to architectural discussions.

**Key Responsibilities**

+ Design, develop, and maintain robust, scalable, and high-performance backend applications and services using Java and the Spring ecosystem (Spring Boot, Spring Framework).
+ Write clean, efficient, well-documented, and testable code following best practices and design patterns.
+ Collaborate with product owners, architects, and other developers to understand requirements, defi...