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Developer Java United Kingdom Jobs

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Java Developer for Trading (Securities Lending)
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Join Citi’s Equities Technology team in London as a **Java Developer for Securities Lending**. Leverage 6-10 years of experience in Java, Kafka, SQL, and Git to build high-impact trading systems. Thrive in a global, agile environment with hybrid work, 27 days leave, and private medical care. Engi...
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United Kingdom , London
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Citi
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Senior Java Developer
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Senior Java Developer sought by Barclays for their LF Custody platform team in Glasgow. This senior technical role focuses on hands-on development and engineering leadership, not people management. You will design and deliver scalable solutions using Java J2EE, Spring, and messaging technologies ...
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United Kingdom , Glasgow
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Barclays
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Java Developer
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Senior Java Developer sought for a high-impact role on a global eBond trading platform in London. You will architect and optimize high-throughput trade flows using expert-level Java, Multithreading, and Reactive Programming (RxJava). Deep knowledge of AMPS, Kafka, and low-latency socket programmi...
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United Kingdom , London
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Randstad
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Senior Java Developer
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Senior Java Developer sought by Citi Belfast to design and deploy microservices and RESTful APIs using Spring Boot. Requires 5+ years of core Java expertise, multi-threading, and Spring Framework proficiency. Join a global banking leader offering hybrid work, 27 days leave, private medical care, ...
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United Kingdom , Belfast
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Citi
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Java Developer - FIF
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Join our FIF team as a Java Developer in London. You will build scalable, high-quality software using Java and the Spring ecosystem. We seek expertise in MS SQL, concurrency, and performance optimization. Enjoy a competitive holiday allowance, private medical care, life assurance, and pension con...
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United Kingdom , London
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Barclays
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Productivity And Tooling Java Developer - Assistant Vice President
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Join Citi as a Productivity & Tooling Java Developer (AVP) in London. Build microservices with Java, SpringBoot, and Gradle to empower a global developer community. Drive CI/CD pipelines and clean code in a hybrid role. Enjoy 27 days leave, bonus, private medical, and pension.
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United Kingdom , London
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Citi
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Senior Java Developer - Fixed Income Algo Technology
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Senior Java Developer role in London, focusing on Fixed Income Algo Technology. You will design low-latency, high-throughput trading components using Core Java, Kafka, and Chronicle. Collaborate directly with Traders and Quants to build robust back-testing frameworks and live trading systems. Ben...
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United Kingdom , London
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Citi
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Lead Java Developer
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Lead Java Developer sought by Citi in London to engineer the future of global finance. You will lead real-time risk enhancements for Credit products, leveraging Core Java, Microservices, and AWS. This senior role demands expertise in JVM tuning, Kafka, and Front Office risk calculations. Enjoy 27...
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United Kingdom , London
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Java (Kotlin) Developer (Agile, Test-Driven) – Vp
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Senior Java/Kotlin Developer needed to engineer the future of global finance at Citi in London. Drive innovation on the Core Prime Brokerage platform using TDD, cloud technologies (Kubernetes), and messaging systems (Kafka). Lead an agile team, champion CI/CD, and enjoy 27 days leave, bonus, and ...
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United Kingdom , London
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Java Developer
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Join Barclays in London as a Java Developer. Design and enhance low-latency, high-throughput connectivity applications for global Futures and Options trading. Utilize Core Java and scripting skills within critical financial systems. Enjoy extensive benefits including private medical care, pension...
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United Kingdom , London
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Barclays
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Java / Angular Software Developer
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Join a high-performing Agile team in Manchester as a Java/Angular Developer. You will design, develop, and maintain modern full-stack applications using Java, Spring Boot, and Angular. This role requires 5+ years of experience building RESTful APIs and scalable services. Strong skills in SQL/NoSQ...
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United Kingdom , Manchester
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RED Commerce - The Global SAP Solutions Provider
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Fx Risk Java Developer
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Join Citi's Markets Technology as an FX Risk Java Developer (VP) in London. You will design and implement core Java solutions using JDK11+, multithreading, and data structures for front-office systems. The role requires experience with SQL/NoSQL databases, messaging queues, and TDD. We offer a co...
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United Kingdom , London
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Citi
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Data Security Backend Engineer - Java/ UI Development
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Join Citi's Tech team in Belfast as a Mid-level UI Frontend Developer. Engineer secure, high-performance user interfaces using TypeScript and React.js within a global financial leader. Enjoy a competitive package including bonus, private healthcare, and hybrid work flexibility while shaping the f...
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United Kingdom , Belfast
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Java Developer
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Join Citi Tech in Belfast to engineer the future of global finance. Develop robust Java microservices using Spring Boot and advanced SQL. Enjoy a competitive package with bonus, private healthcare, and hybrid flexibility. Solve real-world challenges at an unparalleled scale.
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United Kingdom , Belfast
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Front Office Senior Java Developer
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Join Barclays in Glasgow as a Senior Java Developer, embedded within the Front Office. You will build scalable Java/Spring Boot solutions for the global EFG Funding Desk, directly supporting critical T+1 settlement transitions. This role requires strong collaboration with business users and offer...
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United Kingdom , Glasgow
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Barclays
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Java / Angular Software Developer
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Join a high-performing Agile team in Manchester as a full-stack Java/Angular Developer. You will design and build modern web applications and scalable backend services using Java, Spring Boot, and Angular. This role requires 5+ years' experience, strong skills in RESTful APIs, databases, and CI/C...
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United Kingdom , Manchester
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RED Commerce - The Global SAP Solutions Provider
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Java / Angular Software Developer
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Join a high-performing engineering team in Manchester as a Java/Angular Developer. You will design and build modern web applications and scalable backend services across the full stack. This role requires 5+ years' experience with Java, Spring Boot, Angular, and RESTful APIs. Work in an Agile env...
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United Kingdom , Manchester
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RED Commerce - The Global SAP Solutions Provider
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Lead Java Developer - FX Options Realtime Risk
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Lead a team developing critical FX Options real-time risk systems in London. Utilize your Java expertise in distributed systems and data processing to drive technical delivery. This front-office role involves direct collaboration with trading desks and offers a comprehensive benefits package.
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United Kingdom , London
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Citi
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Java Full-Stack Developer
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Join our Core Risk team in London as a Java Full-Stack Developer. You will rebuild and migrate legacy systems using modern Java, Angular, and Cloud tools like Kubernetes. This impactful role requires financial services experience and offers excellent benefits including private medical care and pe...
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United Kingdom , London
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Barclays
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FX eTrading Java Developer - VP
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United Kingdom , London
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Citi
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About the Developer Java role

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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