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Developer United Kingdom Jobs

475 Job Offers

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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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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Not provided
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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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Senior Ab-Initio ETL Developer
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Join our London team to build a next-generation, API-based finance platform. As a Senior Ab-Initio ETL Developer, you will design and develop a complex single ledger solution using Abinitio, MDH, Hadoop, and Kafka. You will engage in full lifecycle development, ensuring robust data controls and l...
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United Kingdom , London
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Citi
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Java Developer
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Join our Equity Finance Technology team in London as a Java Developer. You will build trading applications using Java, Kafka, and SQL within a global, agile environment. This high-impact role offers a performance bonus, private medical care, and 27 days' annual leave. Apply your expertise to solv...
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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 Belfast team as a Java/Full Stack Developer. You will build scalable enterprise applications using Java, Spring, and modern front-end frameworks like Angular/React. This role offers a competitive package including bonus, private healthcare, and 27 days annual leave, while contributing to...
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United Kingdom , Belfast
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Citi
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Legal Software Developer
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Join a specialist debt recovery law firm in Wigan for a greenfield project. As a Legal Software Developer, you'll build a bespoke case management system from scratch. You'll need strong development skills and experience with legal or workflow software. This role offers full ownership and high imp...
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United Kingdom , Wigan
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80000.00 - 150000.00 GBP / Year
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Douglas Scott
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Full Stack Developer
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Join our team in Belfast as a Full Stack Developer. You will design and build robust applications using Java, Spring Boot, and modern CI/CD tools like Tekton on OpenShift. This role focuses on DevOps automation and enhancing the developer experience within an agile environment. We offer a competi...
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United Kingdom , Belfast
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Citi
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Website and Social Media Developer
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Shape our brand voice as the sole Marketeer in this newly created role. Develop PR strategy, create compelling content, and manage our website and social media from your own office in Ashford. Enjoy a pension, bonus, and private parking while driving engagement and growth.
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United Kingdom , Ashford
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40000.00 - 45000.00 GBP / Year
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Office Angels
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Senior Python Developer
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Join a profitable, product-led B2C business scaling its successful platform. As a Staff/Principal-level Python Developer, you'll own architecture and key technical decisions with high autonomy. This fully remote UK role offers equity and the chance to impact a product with a large, paying user base.
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United Kingdom
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110000.00 GBP / Year
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Oho Group Ltd
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Senior Backend Software Developer - Python/Django
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Join Xelix, a fast-growing AI scale-up, as a Senior Backend Developer. You will build robust, scalable Python/Django solutions and REST APIs in a hybrid London role. Leverage your expertise in AWS, PostgreSQL, and CI/CD to shape the future of financial automation. Enjoy great benefits, including ...
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United Kingdom , London
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70000.00 - 95000.00 GBP / Year
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Xelix
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Frontend Developer - React
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Join Xelix as a Frontend Developer in London. Utilize your expert React, TypeScript, and modern JavaScript skills to build scalable AI solutions. Enjoy a hybrid role with a dog-friendly office, private medical cover, and a strong growth culture. Help shape the future of financial automation in a ...
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United Kingdom , London
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60000.00 - 75000.00 GBP / Year
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Xelix
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Senior eFX Algo Developer
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Join our London team as a Senior eFX Algo Developer. You will design and enhance low-latency Java pricing and trading systems for the FX desk. This front-office role requires strong Java, multithreading, and FIX protocol expertise within an Agile environment. Collaborate closely with traders to d...
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United Kingdom , London
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Not provided
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Crédit Agricole
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Pricing Services Developer
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Join our FX Risk IT team in London as a Pricing Services Developer. You will design and implement low-latency pricing and risk analytics tools for exotic FX derivatives. This role requires strong C#/Java skills, quantitative finance expertise, and collaboration with traders and quants. Work in a ...
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United Kingdom , London
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Not provided
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Crédit Agricole
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Web and Digital Developer
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Join our growing marketing team as a Web & Digital Developer in Brighton. You will own multiple international WordPress sites, enhancing UX, performance, and visual design. Collaborate with creative teams to build engaging digital experiences and interactive event content. Ideal for a proactive d...
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United Kingdom , Brighton
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40000.00 - 45000.00 GBP / Year
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Office Angels
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Electronic Trading Core Developer
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Join Citi London as an Electronic Trading Core Developer. You will build ultra-low latency, self-healing Java microservices for Capital Markets using the Ambrosia framework. This role requires deep expertise in Java, JVM, Linux, and kernel-bypass networking for systems with microsecond response t...
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United Kingdom , London
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Not provided
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Citi
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Until further notice

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.