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Java Senior Developer United Kingdom Jobs (Hybrid work)

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Senior Java Developer
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Join our team in Belfast as a Senior Java Developer. You will drive application development using Java, Kafka, and SQL databases within an Agile SCRUM framework. Your role includes mentoring, peer reviews, and designing distributed systems with Docker/Kubernetes. We offer a competitive package wi...
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United Kingdom , Belfast
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https://www.citi.com/ Logo
Citi
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Until further notice
Senior Full Stack Java Developer
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Join a leading OTC derivatives technology team in Belfast, driving a major tech transformation. As a Senior Full Stack Java Developer, you will build robust solutions using Java, Spring, and Angular. We seek an engineer passionate about TDD, clean code, and distributed systems like AWS or Kafka.
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United Kingdom , Belfast
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Citi
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Until further notice
Senior / Lead Core Java Developer
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Join Citi in Belfast as a Senior/Lead Core Java Developer. You will lead the delivery of a global Equities OMS, collaborating closely with trading desks. This role requires extensive core Java expertise, including multi-threading and system analysis, along with leadership in a matrix environment....
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United Kingdom , Belfast
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Citi
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Until further notice
Senior Java Developer – FX Options Technology
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Join our London team as a Senior Java Developer in FX Options Technology. This hands-on role involves designing features, providing L3 support, and collaborating with trading and quant teams. We seek a credible engineer with strong systems knowledge and a track record in building and renovating p...
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United Kingdom , London
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https://www.citi.com/ Logo
Citi
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Until further notice
Senior Java Developer
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Lead complex application development and systems analysis as a Senior Java Developer in Belfast. Utilize your expertise in software programming, project management, and financial sector knowledge. This senior role involves designing solutions, setting technical standards, and guiding cross-functi...
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United Kingdom , Belfast
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Not provided
https://www.citi.com/ Logo
Citi
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Until further notice
Senior Java Developer
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Join our team in Belfast as a Senior Java Developer. You will design and build distributed systems using Java, Kafka, and SQL databases. This role involves mentoring, Agile development, and optimizing application performance. We offer a competitive bonus, private medical care, and 27 days of annu...
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United Kingdom , Belfast
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Not provided
https://www.citi.com/ Logo
Citi
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Until further notice
Are you an experienced software engineer ready to architect the future of enterprise technology? Your search for challenging and rewarding Java Senior Developer jobs ends here. A Java Senior Developer is a pivotal technical leader responsible for designing, building, and maintaining the high-performance, scalable applications that power modern businesses. This role transcends basic coding; it is a strategic position that blends deep technical expertise with architectural vision and team leadership. Professionals in these roles are typically entrusted with the end-to-end delivery of complex software solutions. Common responsibilities include leading the design and implementation of robust, secure, and scalable applications, often leveraging microservices architectures. They are hands-on experts who write high-quality, well-documented, and maintainable code, but their impact is far broader. Senior Java Developers conduct rigorous code reviews, mentor junior and mid-level engineers, and instill best practices across the development team. They are key collaborators, working closely with cross-functional teams including product managers, business analysts, and architects to translate business requirements into technical specifications and drive projects from conception to deployment. The technical skill set for these jobs is comprehensive and modern. A deep, practical mastery of Core Java (Java 8 and above) is fundamental, coupled with extensive experience in the Spring ecosystem, particularly Spring Boot and Spring Cloud for building microservices. Expertise in designing and consuming RESTful APIs is standard. Today's Senior Java Developer is also expected to be proficient with a suite of supporting technologies that define contemporary development: containerization with Docker, orchestration with Kubernetes, message brokers like Kafka for event-driven systems, and both relational (e.g., Oracle, PostgreSQL) and NoSQL (e.g., MongoDB) databases. Familiarity with ORM tools such as JPA/Hibernate and a strong command of build tools like Maven or Gradle are also common requirements. Beyond pure technical acumen, success in these jobs demands a mindset of continuous improvement and leadership. Senior Developers are advocates for Agile methodologies and CI/CD practices, utilizing tools like Jenkins and Git to ensure efficient and reliable software delivery. They are expected to have a strong grasp of software design patterns, clean code principles, and Test-Driven Development (TDD) using frameworks like JUnit and Mockito. Excellent problem-solving skills, the ability to troubleshoot complex system issues, and clear communication with both technical and non-technical stakeholders are indispensable soft skills. If you are a seasoned developer passionate about building enterprise-grade solutions, mentoring talent, and driving technological innovation, exploring Java Senior Developer jobs is your next strategic career move. Discover opportunities where your expertise will shape robust digital infrastructures and lead transformative projects.

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