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Senior Developer United Kingdom, Belfast Jobs

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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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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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Applications Development Senior Lead Analyst
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Lead Applications Development as a Senior Technology Analyst in Belfast. This senior role requires extensive experience in systems analysis, programming, and project leadership. You will design and implement high-impact solutions while enjoying a comprehensive benefits package including bonus and...
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United Kingdom , Belfast
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Citi
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Senior Development and Quality Engineer
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Lead Development and Quality Engineering initiatives in Belfast. This senior role requires expertise in Java Spring Batch, ETL, and SQL for managing high-volume data systems. You will oversee testing, process improvement, and team management within a major banking environment.
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United Kingdom , Belfast
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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 Development and Quality Engineer
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Lead development and quality engineering initiatives in Belfast. This senior role requires deep Java, Spring Batch, and SQL expertise for managing high-volume ETL processes in a global banking environment. You will oversee the full software lifecycle, ensuring quality and driving process improvem...
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United Kingdom , Belfast
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Citi
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Applications Development Technology Senior Lead Analyst
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Lead the design and implementation of cutting-edge application systems as a Senior Lead Analyst in Belfast. This senior role demands expertise in systems analysis, programming, and project leadership to solve complex business challenges. Enjoy a comprehensive benefits package including bonus, pri...
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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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Applications Development Senior Programmer Analyst
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Join our Engineering Excellence team in Belfast as a Senior Programmer Analyst. You will leverage modern software engineering and DevOps practices to build high-performance, multi-threaded applications in Java/Go. This senior role requires 5+ years of experience and offers a strong benefits packa...
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United Kingdom , Belfast
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Citi
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Senior Developer Jobs represent the pinnacle of technical expertise and leadership within software engineering teams. Professionals in these roles are seasoned experts who not only write high-quality code but also architect complex systems, guide technical strategy, and mentor less experienced engineers. They are the crucial bridge between high-level business objectives and practical, robust technical implementation, ensuring that software solutions are scalable, secure, and aligned with long-term organizational goals. Typically, a Senior Developer is responsible for the entire software development lifecycle of significant components or applications. This includes leading the design and architecture of new systems, often leveraging modern paradigms like microservices and event-driven architecture. They write, review, and debug complex code, setting standards for quality and maintainability. A key part of their role involves making pivotal technology stack decisions, selecting frameworks, databases, and tools that best fit project requirements. They collaborate closely with cross-functional teams, including product managers, business analysts, and other stakeholders, to translate business needs into technical specifications. Furthermore, Senior Developers are expected to drive best practices in coding, testing, and deployment, frequently overseeing CI/CD pipelines and advocating for DevOps and security principles (DevSecOps). The common skill set for these jobs is both deep and broad. Mastery of one or more core programming languages (such as Java, Python, C#, or JavaScript) and their associated ecosystems is fundamental. Expertise in relevant frameworks (e.g., Spring Boot, .NET Core, React, Angular) is essential. Senior Developers possess a strong grasp of system design principles, database management (both SQL and NoSQL), and API design (REST, GraphQL). Experience with cloud platforms (AWS, Azure, GCP), containerization (Docker), and orchestration (Kubernetes) is increasingly standard. Beyond technical prowess, soft skills are critical: leadership, clear communication, effective mentorship, problem-solving, and the ability to manage time and priorities across multiple projects are what distinguish a senior professional. Typical requirements for Senior Developer jobs often include a bachelor’s degree in computer science or a related field (or equivalent practical experience) and a substantial track record, usually between 5 to 10+ years of progressive software development experience. Demonstrated experience in leading development initiatives, making architectural decisions, and working within Agile/Scrum methodologies is commonly sought. The role demands a proactive, strategic thinker who stays abreast of emerging technologies and can drive innovation while ensuring system reliability and performance. For those seeking to advance their impact beyond pure coding into areas of design, strategy, and team leadership, exploring Senior Developer jobs is the definitive next step in a thriving tech career.

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