Jobs in Belfast United Kingdom

Software Engineer AI

Staff Software Engineer/Tech Lead (Distributed systems) - SVP

Java Software Engineer

Citi is a world-leading global bank. We have approximately 200 million customer accounts and a presence in more than 160 countries and jurisdictions worldwide. We provide consumers, corporations, governments, and institutions with a broad range of financial products and services, including consumer banking and credit, corporate and investment banking, securities brokerage, transaction services, and wealth management. We enable clients to achieve their strategic financial objectives by providing them with cutting-edge ideas, best-in-class products and solutions, and unparalleled access to capital and liquidity. Citi Belfast is one of the largest employers in Northern Ireland with a diverse and talented team of over 4000 people from over 68 different nationalities across our four Belfast offices. We are the only global investment bank operating in Northern Ireland. Every day, our local experts interact with global teams in over 100 countries developing and supporting next-generation technology solutions for the enterprise and delivering critical services to the bank and its customers, to make sure we are a stronger and safer organization for our clients. You will have a truly global reach, which will provide you with new experiences and development opportunities right here in Belfast’s iconic Titanic Quarter. The Global Fixed Income Trade Processing (FiTP) Team is seeking a Senior Software Engineer (Java) with a proven track record of design and developing large, complex and distributed systems. The successful individual will ideally have a good knowledge of Fixed Income products and experience in building software systems to handle the capture and processing of high volume of such trades. In this fast paced environment you must be able to prioritize tasks, work within deadlines, taking a pragmatic and thoughtful approach, paying close attention to details. You will need to employ strong communication skills, necessary to effectively produce client solutions. This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required. Knowledge/Experience: • Bachelor’s degree with a relevant major (Computer Science, Information Technology, Mathematics, Engineering, or similar) • 5+ years of experience in design and development of high performance, low-latency, multi-threaded applications. • Extensive hands-on development experience in Java. • Demonstrated ability to learn new business concepts and technologies. • Ability to work under pressure and manage deadlines or unexpected changes in expectations or requirements Technical: • Solid understanding of software development fundamentals including data structures, design patterns and object-orientated programming. • Proficiency in core Java (5+ years of experience) with demonstrable success in developing multi-threaded applications and expert level knowledge in data structures, algorithms, collections, and error handling. • Spring Framework (and Spring Boot): This is almost non-negotiable for enterprise Java development. Expertise in Spring Boot for rapid application development, Spring MVC for web applications, Spring Data JPA for persistence, and Spring Security for authentication / authorization. • Microservices Architecture: Understanding how to design, develop, and deploy independent, loosely coupled services, which is a common pattern for applications running on ECS. • RESTful APIs: Designing, developing, and consuming RESTful web services using Java and Spring Boot. • Build Tools: Maven or Gradle for project management and build automation. • Proven ability to develop clean, testable code. • Understanding of relational database concepts and knowledge in SQL. • Experience with Jira, Git/Bitbucket, Gradle and CI/CD tools, e.g. TeamCity and UrbanCode Deploy. • Experience with Linux/Unix. • Knowledge on cloud technologies e.g. Artifactory, Docker and OpenShift. • Knowledge of fixed income products, customer and broker market platforms and trading protocols desirable. What we’ll provide you: By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as: • 27 days annual leave (plus bank holidays) • A discretional annual performance related bonus • Private Medical Care & Life Insurance • Employee Assistance Program • Pension Plan • Paid Parental Leave • Special discounts for employees, family, and friends • Access to an array of learning and development resources Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive. ------------------------------------------------------ Job Family Group: Technology ------------------------------------------------------ Job Family: Applications Development ------------------------------------------------------ Time Type: Full time ------------------------------------------------------ Most Relevant Skills Please see the requirements listed above. ------------------------------------------------------ Other Relevant Skills For complementary skills, please see above and/or contact the recruiter. ------------------------------------------------------ Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law. If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi. View Citi’s EEO Policy Statement and the Know Your Rights poster.

Software Engineer with DV Security Clearance

Software Engineer (DV Security Clearance) Position Description At CGI, our Software Engineers help shape enterprise-scale platforms that deliver real, measurable impact for our clients. In this role, you will design and build high-quality software solutions that are secure, scalable, and production-ready, contributing directly to complex programmes that transform how organisations operate. You'll work in an environment where collaboration, ownership, and creativity are actively encouraged, supported by trusted teams and modern delivery practices. At CGI, you'll have the freedom to take responsibility for your work, innovate with confidence, and grow your career while helping deliver technology that truly makes a difference. CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK 'Best Employer' by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you'll be part of an open, friendly community of experts. We'll train and support you in taking your career wherever you want it to go. Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance. This is a hybrid position. Your future duties and responsibilities In this role, you will design, develop, and maintain software components within an enterprise-scale environment, ensuring solutions meet defined architectural, security, and quality standards. You will collaborate closely with architects, testers, and infrastructure teams to deliver robust, integrated systems that perform at scale and are ready for production use. You will take ownership of your deliverables, contribute to continuous improvement across the software lifecycle, and be supported by experienced colleagues and proven delivery frameworks to help you succeed and grow. Key responsibilities include: -Design & Build secure, scalable software components aligned to architectural standards -Collaborate & Integrate with architects and system integrators to ensure interoperability -Develop & Maintain clean, efficient, and well-tested code -Test & Resolve issues through performance testing, benchmarking, and troubleshooting -Review & Improve code quality using version control and CI/CD practices -Support & Document configuration management and environment setup Required qualifications to be successful in this role You will be an experienced Software Engineer with a strong background in designing and delivering enterprise-grade software solutions. You should be comfortable working across the full development lifecycle, collaborating with multidisciplinary teams, and applying best practices to ensure quality, security, and performance. Essential qualifications and experience: -Proven experience developing software in an enterprise-scale environment -Strong proficiency in one or more modern programming languages -Experience with APIs, system integration, and distributed systems -Familiarity with CI/CD pipelines, version control, and automated testing -Ability to troubleshoot complex technical issues across multiple environments -Experience working to defined security, performance, and compliance standards Together, as owners, let's turn meaningful insights into action. Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you'll reach your full potential because You are invited to be an owner from day 1 as we work together to bring our Dream to life. That's why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company's strategy and direction. Your work creates value. You'll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise. You'll shape your career by joining a company built to grow and last. You'll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons. Come join our team-one of the largest IT and business consulting services firms in the world.

Senior Software Engineer (Node.js)

Join Kainos and Shape the Future At Kainos, we’re problem solvers, innovators, and collaborators - driven by a shared mission to create real impact. Whether we’re transforming digital services for millions, delivering cutting-edge Workday solutions, or pushing the boundaries of technology, we do it together. We believe in a people-first culture, where your ideas are valued, your growth is supported, and your contributions truly make a difference. Here, you’ll be part of a diverse, ambitious team that celebrates creativity and collaboration. Ready to make your mark? Join us and be part of something bigger. MAIN PURPOSE OF THE ROLE & RESPONSIBILITIES IN THE BUSINESS: As a Senior Software Engineer (Senior Associate) in Kainos, you’ll be responsible for developing high quality solutions which delight our customers and impact the lives of users worldwide. It’s a fast-paced environment so it is important for you to make sound, reasoned decisions. You’ll do this whilst learning about new technologies and approaches, with talented colleagues that will help you to learn, develop and grow as you, in turn, mentor those around you. MINIMUM (ESSENTIAL) REQUIREMENTS: • Strong experience with following technical stack - AWS, Node (or any Javascript frameworks), Typescript, Terraform, AWS CDK • Proficient in designing, building, testing and maintaining modern software applications • Experience of applying development best practices and patterns in relation to security, scalability and performance • Contributing to technical decisions and direction in a collaborative team environment, including architecture, estimation, product planning, user story/requirement creation. • Experience of design and development across multiple layers of an application • Mentoring junior team members DESIRABLE: • Good communication skills, with the ability to communicate issues to technical and non-technical people. • Experience of Continuous Integration and Continuous Delivery techniques • Experience of debugging and troubleshooting live applications • Active participation in knowledge sharing activities, both within the team and with wider non-technical audiences • Experience of multiple programming languages and data storage technologies • Experience of balancing technical decisions with user needs and commercial constraints • Knowledge of public cloud platforms, such as AWS and Azure, including SaaS and PaaS offerings Embracing our differences At Kainos, we believe in the power of diversity, equity and inclusion. We are committed to building a team that is as diverse as the world we live in, where everyone is valued, respected, and given an equal chance to thrive. We actively seek out talented people from all backgrounds, regardless of age, race, ethnicity, gender, sexual orientation, religion, disability, or any other characteristic that makes them who they are. We also believe every candidate deserves a level playing field. Our friendly talent acquisition team is here to support you every step of the way, so if you require any accommodations or adjustments, we encourage you to reach out. We understand that everyone's journey is different, and by having a private conversation we can ensure that our recruitment process is tailored to your needs.