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Software Engineer United Kingdom, Belfast Jobs

20 Job Offers

Software Test Engineer (AVP)
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Citi seeks a Software Test Engineer (AVP) in Belfast to join the Global Fixed Income Trade Processing Team. You will design test plans, automate frameworks using Java, Selenium/Cypress, and API testing, while driving quality for systems handling $5 trillion daily. Ideal candidates have strong CI/...
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United Kingdom , Belfast
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Citi
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Senior Software Engineer (AVP) – Margin Technology
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Senior Software Engineer (AVP) role in Citi’s Margin Technology team, based in Belfast. You will build high-impact financial systems using Java, React, and Python, with expertise in RESTful APIs, TDD, and clean code. Join a global team solving complex problems at massive scale, with hybrid work, ...
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United Kingdom , Belfast
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Citi
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Java/Kotlin Software Engineer – AVP - (Developer Enablement)
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United Kingdom , Belfast
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Citi
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Java Software Engineer, Wholesale Credit Risk Analytics
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Join our Credit Risk Technology team in Belfast as a Java Software Engineer. You'll build critical risk management and stress testing solutions using Java, Spring, and Apache Flink. We seek a hands-on developer with GenAI tool experience (GitHub Copilot) and cloud expertise (AWS/Azure). Enjoy 27+...
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United Kingdom , Belfast
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Citi
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Senior Software Engineer - Margin Technology
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Senior Software Engineer - Margin Technology at Citi in Belfast. Build high-impact financial systems using Java, React, and Python, with RESTful APIs and TDD. Join a global team solving complex problems at massive scale. Enjoy 27 days leave, bonus, private medical, and hybrid work.
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United Kingdom , Belfast
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Citi
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Senior Software Engineer
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Senior Software Engineer sought in Belfast to build high-quality, scalable applications impacting global users. You will drive technical decisions, mentor junior developers, and apply best practices in security and performance. Ideal for experienced engineers proficient in full-stack development,...
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United Kingdom , Belfast
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Kainos
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Gen AI Python Software Engineer
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Join Citi's Markets Technology team in Belfast as a Gen AI Python Software Engineer. Build scalable, production-grade AI solutions using Python and modern LLM patterns. Enjoy a competitive package with hybrid work, 27 days' leave, and a performance bonus while shaping the future of global finance.
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United Kingdom , Belfast
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Citi
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Specialist Embedded Software Engineer
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Join our Belfast team as an Embedded Software Engineer. Develop cutting-edge Linux firmware for broadband devices like home gateways and Wi-Fi extenders. We seek strong C programming, Agile, and embedded Linux experience. Enjoy a competitive bonus, pension, and exclusive BT benefits.
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United Kingdom , Belfast
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Plusnet
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Senior Software Engineer
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Join our team in Belfast as a Senior Software Engineer. You will design and build high-scale distributed systems using Java and microservices for a global platform. This role requires 5+ years of experience, cloud expertise (AWS/Azure/GCP), and offers the chance to mentor engineers and shape tech...
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United Kingdom , Belfast
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Bazaarvoice
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Software Engineer
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United Kingdom , Belfast
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Citi
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Senior Staff Software Engineer
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United Kingdom , Belfast
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Bazaarvoice
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Senior Software Engineer
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United Kingdom , Belfast
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Bazaarvoice
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Senior Software Engineer
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United Kingdom , Belfast
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Bazaarvoice
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Staff Software Engineer
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United Kingdom , Belfast
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Bazaarvoice
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Senior Software Engineer - Build AI Tools
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Join Citi's new GenAI Security team in Belfast as a Senior Software Engineer. Design and build a scalable security platform to protect AI applications from adversarial attacks. Leverage your expertise in Python/Go and secure APIs within a collaborative, cutting-edge environment. This role offers ...
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United Kingdom , Belfast
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Citi
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Senior Software Engineer
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Join Citi's Developer Enablement team in Belfast as a Senior Software Engineer. You will build internal platforms and tools using Java/Kotlin, microservices, and Kafka to improve the SDLC for thousands of engineers. We seek expertise in cloud-native tech, DevOps, and CI/CD. Enjoy excellent benefi...
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United Kingdom , Belfast
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Citi
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Software Engineer II (Frontend)
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Join DailyPay's mission to transform financial wellness as a Frontend Software Engineer in Belfast. You'll build high-quality React and React Native apps using TypeScript, focusing on scalability and user experience. This role offers equity ownership, private health insurance, and a generous pens...
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United Kingdom , Belfast
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41000.00 - 54000.00 GBP / Year
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Fin Capital
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Java Software Engineer
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Join our Global Fixed Income team in Belfast as a Senior Java Software Engineer. Design and develop complex, high-volume trade processing systems for Fixed Income products. We seek an expert in Java, multi-threaded applications, and distributed systems. Enjoy excellent benefits including bonus, p...
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United Kingdom , Belfast
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Citi
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Senior Software Engineer
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Join Arqit, a leader in quantum-safe cybersecurity, as a Senior Software Engineer in Belfast. Develop mission-critical, scalable encryption software using Python, with opportunities in Rust and AngularJS. Enjoy a comprehensive benefits package including equity, bonus, and private medical insuranc...
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United Kingdom , Belfast
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Arqit
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Senior Principal Software Engineer
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Lead architectural development for cybersecurity products as a Senior Principal Software Engineer at Rapid7 in Belfast. This role requires 12+ years of Java experience and expertise in designing complex, scalable enterprise software. You will drive technical strategy, foster innovation, and champ...
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United Kingdom , Belfast
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Rapid7
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About the Software Engineer role

Explore the dynamic and in-demand world of software engineering jobs, where professionals design, build, and maintain the digital infrastructure that powers modern life. Software engineers, often synonymous with developers, are the creative problem-solvers and architects behind websites, mobile apps, operating systems, and complex enterprise systems. This career path blends analytical thinking with creative design to translate user needs and business goals into functional, efficient, and scalable software solutions.

The core responsibility of a software engineer is the full software development lifecycle. This typically begins with analyzing requirements and collaborating with product managers, designers, and other stakeholders. Engineers then design system architecture, write clean and maintainable code, and rigorously test their creations to ensure reliability and performance. A significant part of the role involves debugging issues, optimizing existing systems, and deploying updates. Many engineers also participate in code reviews to maintain quality standards and contribute to technical documentation. In today's agile environments, they often work in iterative cycles, continuously integrating and delivering new features.

Software engineering jobs can be specialized, but common areas include front-end (client-side), back-end (server-side), and full-stack development. Front-end engineers focus on user interfaces and experiences using technologies like HTML, CSS, and JavaScript frameworks. Back-end engineers build the server logic, databases, and application programming interfaces (APIs) that power functionality behind the scenes. Full-stack engineers possess skills across both domains. Other specializations include DevOps, security, data engineering, and cloud-native development.

Typical skills and requirements for these roles are both technical and soft-skills based. Fundamentally, proficiency in one or more programming languages such as Python, Java, JavaScript, C#, or Go is essential. Understanding data structures, algorithms, and system design principles is crucial. Experience with frameworks, databases (SQL and NoSQL), and version control systems like Git is commonly expected. As software is increasingly built for the cloud, familiarity with services from providers like AWS, Azure, or GCP is a valuable asset. Equally important are strong problem-solving abilities, attention to detail, and effective communication skills for teamwork. While many positions require a degree in computer science or a related field, a proven portfolio and relevant experience are also highly valued pathways into software engineering jobs.

The profession offers immense variety, with opportunities to build everything from life-saving health applications and financial platforms to immersive games and cutting-edge AI tools. It is a career characterized by continuous learning, collaboration, and the tangible impact of creating products used by millions. For those with a logical mind and a passion for building, software engineering jobs present a rewarding and future-proof career path with endless possibilities for innovation and growth.