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Senior Java developer United Kingdom Jobs

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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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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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Citi
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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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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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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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Senior Java Developer
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Join our London team as a Senior Java Developer. You will design and maintain scalable applications and microservices on GCP (GKE, PubSub, BigQuery). Your role includes mentoring juniors, building data pipelines, and ensuring quality via CI/CD and Agile practices. Apply your expertise in OOP and ...
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United Kingdom , London
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80000.00 - 90000.00 GBP / Year
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Signify Technology
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Explore senior Java developer jobs and discover a pivotal career at the heart of modern software engineering. A Senior Java Developer is an experienced professional responsible for designing, building, and maintaining high-performance, scalable, and secure enterprise-grade applications. This role transcends basic coding, involving deep architectural contributions and technical leadership within development teams. Professionals in these positions are instrumental in transforming business requirements into robust technical solutions, ensuring system reliability, and driving technological innovation. Typically, the core responsibilities of a Senior Java Developer encompass the entire software development lifecycle. They lead the design and implementation of application architecture, often focusing on microservices and distributed systems. Writing clean, efficient, and well-documented code using core Java and modern frameworks like Spring Boot is fundamental. They develop and integrate RESTful APIs, design data persistence layers using both SQL and NoSQL databases, and implement security protocols. A significant part of the role involves mentoring junior developers, conducting rigorous code reviews, and advocating for best practices in code quality and testing. Furthermore, they collaborate closely with cross-functional teams including product managers, business analysts, and DevOps engineers to define requirements, troubleshoot complex issues, and ensure timely project delivery. The typical skill set for these senior roles is extensive and evolving. A strong foundation in Core Java (including versions 8 and above) and the Spring ecosystem (Spring Boot, Spring Cloud, Spring Security) is essential. Expertise in microservices architecture, containerization with Docker, and orchestration with Kubernetes is highly common. Proficiency in building event-driven systems using messaging platforms like Kafka, alongside experience with CI/CD pipelines and tools like Jenkins and Git, is expected. Beyond technical prowess, successful candidates demonstrate excellent problem-solving abilities, a keen understanding of system design patterns, and a commitment to writing testable code using frameworks like JUnit. Familiarity with cloud platforms (AWS, Azure, GCP) and front-end technologies (like Angular or React) is often a valuable asset. Senior developers are also expected to possess strong soft skills: clear communication, the ability to lead initiatives, a growth mindset adaptable to new technologies like AI tooling, and a collaborative spirit focused on continuous improvement. When searching for senior Java developer jobs, candidates should be prepared for roles that demand both deep technical expertise and strategic influence. These positions offer the opportunity to work on critical systems, guide technical direction, and play a key role in an organization's digital transformation. Whether focusing on backend services, full-stack development, or specialized domains, senior Java developers are the cornerstone of building resilient and forward-looking software platforms.

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