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Developer Java United Kingdom Jobs

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Agile Java Developer
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Join Citi's DevOps team in Belfast as an Agile Java Developer. You will build productivity tools using Java, Spring Boot, and Linux to enhance the developer experience globally. This role requires expertise in CI/CD, Gradle/Maven, and offers benefits like a performance bonus and private medical c...
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United Kingdom , Belfast
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Citi
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Senior Java Microservices Developer
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Join our team in Belfast as a Senior Java Microservices Developer. You will design and build scalable Spring Boot microservices for Private or Hybrid Cloud (GCP/AWS). We seek an expert in system design, Kafka, TDD/BDD, and modern CI/CD/DevOps practices. Champion engineering excellence through tru...
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United Kingdom , Belfast
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Citi
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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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Citi
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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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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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Lead Full Stack Java Developer
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Lead Full Stack Java Developer role in Belfast. Drive tech transformation for OTC derivatives, using Java, microservices, and cloud platforms. Lead a team, architect solutions, and foster a strong engineering culture in a global investment bank.
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United Kingdom , Belfast
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Citi
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Java Full Stack Developer
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Seeking a Senior Java Full Stack Developer in Belfast. Design and develop enterprise applications using Java, Spring, and Angular/React. Enjoy extensive benefits including bonus, private healthcare, and 27 days leave. Lead high-impact projects in a collaborative tech environment.
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United Kingdom , Belfast
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Citi
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Java Developer Equity Finance Technology – VP
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Join our Equity Finance Technology team in Belfast as a VP Java Developer. You will build high-impact trading solutions using strong Java, JMS, and Kafka expertise. This role offers agile collaboration with traders, leadership opportunities, and a comprehensive benefits package.
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United Kingdom , Belfast
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Java Developer - AVP
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Join our Belfast team as a Java Developer - AVP. You will drive application development using Java, Kafka, and SQL databases within an Agile SCRUM framework. Key responsibilities include hands-on coding, system design, and ensuring performance in distributed systems. This role offers a chance to ...
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United Kingdom , Belfast
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Java / Kotlin Developer – Equities Derivatives Strategic Pre-Trade Technology
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Join our Equity Derivatives strategic pre-trade technology team in Belfast as a Java/Kotlin Developer. You will transform systems into a best-in-class platform using microservices, Kubernetes, and CI/CD pipelines. We offer strong benefits, including a performance bonus and private medical care, i...
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United Kingdom , Belfast
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Core Java Developer
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Join Citi in Belfast as a Core Java Developer. You will build and support a global Cash & Derivatives OMS, collaborating closely with trading desks. We seek an expert in Java, multi-threading, and tools like Git, Maven, and Linux. This role offers a competitive package including bonus, private he...
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United Kingdom , Belfast
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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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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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Citi
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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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Citi
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Java Developer
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Join our team in Belfast as a Java Developer. You will design and build distributed systems using Java, Kafka, and SQL databases within an Agile SCRUM framework. This role involves hands-on development, peer code reviews, and performance optimization. We offer a competitive package including bonu...
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United Kingdom , Belfast
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Citi
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Java Full Stack Developer
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Join our Belfast team as a Senior Java Full Stack Developer. You will design and enhance a critical enterprise-wide client data system using Java, Spring, and Angular/React. This role offers a performance bonus, private medical care, and 27 days annual leave. Apply your expertise to lead innovati...
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United Kingdom , Belfast
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Citi
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Market Tech Java Developer
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Lead Java applications development as a Technology Lead Analyst in London. This senior role requires 6-10 years of experience, SME-level expertise, and strong project leadership. You will design systems, implement enhancements, and integrate complex business processes in a dynamic environment.
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United Kingdom , London
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Citi
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Senior Java Developer
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Join Citi's Technology team in Belfast as a Senior Java Developer. Design data pipelines using Java, Hadoop, and Spark while mentoring junior team members. Enjoy benefits like a performance bonus, private medical care, and 27 days annual leave. Drive innovation in a diverse, inclusive banking env...
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United Kingdom , Belfast
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Citi
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Java Algo Trading Developer
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Join Citi's Rates Algo Trading team in London as a Java Developer. Design and build high-performance, low-latency trading applications using core Java and multi-threaded programming. This role partners with business and quant teams, requiring strong fundamentals and a passion for technology. We o...
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United Kingdom , London
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Citi
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Senior Full Stack Java Developer
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Join Citi's FX Data Analytics & AI team in London as a Senior Full Stack Java Developer. Engineer robust, scalable data pipelines using Java, Spark, and cloud-native technologies within a dynamic trading environment. This role offers a competitive package including bonus, private medical care, an...
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United Kingdom , London
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Citi
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Explore the dynamic world of Java developer jobs, a cornerstone of the modern technology landscape. Java developers are the architects and builders behind a vast array of robust, scalable, and secure software applications that power everything from enterprise-level banking systems and e-commerce platforms to web services and mobile applications. This profession is centered on using the Java programming language and its extensive ecosystem to translate complex business requirements into functional, efficient, and maintainable software solutions. For those with a passion for problem-solving and a logical mindset, a career in Java development offers immense opportunity and stability. A Java developer's typical responsibilities encompass the entire software development lifecycle. This begins with analyzing user needs and collaborating with business analysts and product managers to define technical specifications. They then design application architecture, write clean, well-documented code, and perform unit testing to ensure quality. A significant part of the role involves debugging and troubleshooting issues to maintain application health and performance. Many Java developers are also responsible for deploying applications to servers and providing ongoing maintenance and support, including implementing new features and security patches. In more senior or lead positions, responsibilities expand to include mentoring junior team members, making high-level architectural decisions, driving best practices in coding standards, and collaborating with cross-functional teams to ensure successful project delivery. The skill set for Java developer jobs is both deep and broad. A strong foundation in core Java concepts such as object-oriented programming (OOP), multithreading, and collections is non-negotiable. Proficiency with popular Java frameworks is essential, with Spring (including Spring Boot and Spring MVC) and Hibernate being among the most sought-after. As many roles involve building web applications, knowledge of full-stack development is increasingly common, encompassing front-end technologies like HTML, CSS, and JavaScript (often with frameworks like React or Angular). Understanding relational databases (e.g., PostgreSQL, MySQL) and SQL is crucial, as is experience with building and consuming RESTful web services. Familiarity with development tools such as Maven or Gradle, Git for version control, and Jenkins for CI/CD pipelines is standard. Beyond technical prowess, successful Java developers possess strong analytical thinking, excellent problem-solving abilities, and effective communication skills to collaborate within a team. Typical requirements for these positions often include a bachelor’s degree in computer science, software engineering, or a related field, although substantial equivalent experience is frequently accepted. The profession offers a clear career trajectory, from entry-level developer roles to senior, lead, and architect positions. With Java's enduring popularity and its application in critical systems worldwide, Java developer jobs remain in high demand, offering a rewarding career path for those dedicated to building the technology that drives our digital world.

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