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Developer United Kingdom Jobs

456 Job Offers

Senior AI Frontend Engineer (Developer Productivity)
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Join Citi in Belfast as a Senior AI Frontend Engineer. Leverage your deep React/TypeScript expertise to build the UI for a next-gen AI Developer Productivity platform. You'll transform cutting-edge Generative AI into intuitive experiences for 50,000+ global engineers. Enjoy top benefits including...
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United Kingdom , Belfast
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Not provided
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Citi
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Until further notice
Cloud Developer
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Join our team in Bracknell as a Cloud Developer. You will design and maintain scalable cloud applications using AWS, Azure, or GCP, with Python or TypeScript. Collaborate in Scrum teams to deliver secure, innovative solutions. We offer hybrid working, flexible benefits, and dedicated career devel...
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United Kingdom , Bracknell
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60000.00 - 70000.00 GBP / Year
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SCC
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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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Business Risk Officer – (Data Science / Developer)
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Join Citi in Belfast as a Business Risk Officer, leveraging your Data Science and Developer expertise. You will design innovative prototypes using Python, SQL, and GenAI to drive risk management and strategic initiatives. This role offers a competitive package including bonus, private healthcare,...
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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 Ab Initio Developer
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Join our Belfast team as a Senior Ab Initio Developer. You will design and build robust ETL solutions using Ab Initio and DataStage to process critical data feeds. We seek an expert in GDE, EME, SQL, and Linux scripting within a full SDLC. Enjoy excellent benefits including bonus, private healthc...
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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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Product Control Tech ETL Developer, AVP
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Join our Global FX Tech team in Belfast as an AVP, ETL Developer. You will design and develop backend services using AB Initio, ensuring data quality and regulatory controls. This role requires strong ETL, data warehousing, and Unix skills within financial services. We offer a competitive bonus, ...
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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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Citi
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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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Citi
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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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Citi
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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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Citi
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Applications Developer - ETL
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Join Citi in Belfast as an ETL Applications Developer. You will design and implement high-performance ETL solutions using Talend within the banking sector. This role requires deep database tuning expertise and experience in trade lifecycle processes. We offer a competitive bonus, private medical ...
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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 Ab Initio Lead Developer
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Lead the design and implementation of advanced Ab Initio ETL solutions as a Senior Lead Developer in London. This senior role requires extensive expertise in Ab Initio components, batch/continuous flows, Oracle PL/SQL, and system analysis. You will manage high-impact projects, provide technical l...
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United Kingdom , London
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Citi
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About the Developer role

Discover the dynamic world of developer jobs, a cornerstone of the modern digital economy. Developers are the creative and technical masterminds behind the software, applications, and systems that power our daily lives. From the websites we browse to the mobile apps we use and the complex enterprise software running global businesses, developers are the architects of our digital future. This profession involves designing, coding, testing, and maintaining the software that drives innovation across every industry.

A developer's primary responsibility is the entire software development lifecycle. This begins with analyzing user needs and then designing robust software solutions to meet those requirements. The core of the role involves writing clean, efficient, and well-documented code in various programming languages. Developers build and maintain the backbone of applications, which includes creating and managing Application Programming Interfaces (APIs), backend services, and database structures. They are responsible for implementing key architectural patterns like microservices to ensure systems are scalable, reliable, and performant. A significant part of their work involves integrating different systems, such as connecting applications to databases, message queues, and third-party services.

Beyond initial creation, developers are tasked with continuous improvement and maintenance. This includes identifying and fixing bugs, optimizing applications for speed and stability, and implementing security best practices to protect against vulnerabilities. They conduct rigorous testing, including unit and integration tests, to ensure software quality. Furthermore, developers collaborate closely with other teams, such as frontend engineers, quality assurance (QA) specialists, and DevOps teams, to enable seamless continuous integration and deployment (CI/CD) pipelines. In many modern environments, developers also work on containerizing applications using tools like Docker and orchestrating them with platforms like Kubernetes. For senior and leadership roles, responsibilities expand to include mentoring junior team members, managing project timelines, making strategic technology decisions, and overseeing a team's output and professional development.

Typical skills and requirements for developer jobs are diverse. A strong foundation in computer science principles is essential. Proficiency in one or more programming languages (such as Go, Java, Python, JavaScript, or C#) is a fundamental requirement. Developers must understand software architecture, including concepts like RESTful APIs, microservices, and event-driven systems. Experience with databases (SQL and NoSQL), version control systems like Git, and operating systems is standard. As the field evolves, knowledge of cloud platforms (AWS, Azure, GCP), containerization, and infrastructure-as-code is increasingly valuable. Crucially, soft skills are just as important; problem-solving abilities, analytical thinking, clear communication, and the capacity to work collaboratively in a team are highly sought after. Most positions require a bachelor's degree in computer science or a related field, or equivalent practical experience. Whether you are an entry-level programmer or an experienced applications development manager, developer jobs offer a challenging and rewarding career path for those passionate about building the technology of tomorrow.