[Skip to main content](#main-content) [ OpenNash ](https://opennash.com/) / [Jobs](https://jobs.opennash.com/) [ 01 Search jobs](https://jobs.opennash.com/search/)[ 02 Companies](https://jobs.opennash.com/explore/)[ 03 Hiring report](https://jobs.opennash.com/reports/hiring/)[ 04 AI assistants](https://jobs.opennash.com/connect/)[ 05 How it works](https://jobs.opennash.com/methodology/) Citigroup · Belfast United Kingdom # Senior Java Applications Developer Belfast United Kingdom Senior individual contributor Software Engineering Listed on Citigroup’s official careers site. Posted October 29, 2026. Check that it is still open and apply there. [Apply on Citigroup’s careers site →](https://citi.wd5.myworkdayjobs.com/2/job/Belfast--United-Kingdom/Senior-Java-Applications-Developer_261002575) [OpenNash Jobs](https://jobs.opennash.com/) / [Citigroup](https://jobs.opennash.com/companies/citigroup/) / Senior Java Applications Developer ## Job description ### About the team Event Master Central is Citi’s centralized corporate action event repository and distribution platform that consolidates corporate action announcements and notifications from various vendors with cross-business operational process. As a critical pillar within the Master Reference Data (MRD) and the broader Citi Enterprise Data Organization (EDO), our team is responsible for modernizing and managing the end-to-end lifecycle of corporate Action events across the enterprise. ### What you will do Develop and implement complex software solutions using Java/J2EE, Spring Boot, and RESTful web services. Design, develop, and maintain robust microservices adhering to architectural best practices. Apply hands-on expertise in Core Java, including multi-threading and the Collections framework. Utilize Spring Framework effectively for application development. Work extensively in creating and optimizing SQL queries. Ensure adherence to software engineering best practices, object-oriented programming (OOP) principles, and design patterns. Contribute to the continuous integration and continuous delivery (CI/CD) pipelines. Manage source code effectively using tools such as Git or Bitbucket. Promote and apply clean coding principles and maintain high quality using tools like Sonar. Design and implement comprehensive unit, integration, and functional tests to ensure solution quality. Analyze and solve complex technical problems efficiently. Work with a team of application developers, fostering a culture of excellence, collaboration, and continuous improvement. ### Key Skills and Experience required Experience in developing and implementing complex software solutions. Strong knowledge of Java/J2EE, Spring Boot, and RESTful web services (XML, JSON). Proven experience working with Microservices Architecture. Hands-on experience with Core Java, Multi-threading, Collections framework, and Spring Framework. Solid understanding of software engineering best practices, OOP, design patterns, and CI/CD pipelines. Experience with source code management tools (Git). Understanding of clean coding principles and code quality measurements using tools like Sonar. Demonstrated ability to design and implement unit, integration, and functional tests. A strong, solution-driven mindset with the ability to analyze complex problems, devise strategic solutions, and lead their implementation. Good written and verbal communication skills. ### Advantages Experience with AI technology (Devin, Co Pilot) Understanding of Cloud-native development principles. Experience with Container Orchestration tools (Docker, Kubernetes, OpenShift, etc.). Proficiency in using Jira for tracking tasks, managing backlogs, and participating in sprint cycles. ### What we can offer At Citi, you will work at the intersection of data, finance, and commercial strategy, contributing to decisions that have real impact across a global organization. This role offers meaningful autonomy, cross-functional collaboration, and the opportunity to grow your analytical and governance expertise within a high-performing team. A hybrid working model with 3 days in the office and 2 days working remotely, giving you flexibility alongside team connection. Exposure to complex, high-value commercial and financial decisions that directly shape vendor strategy at a global scale. Access to learning and development resources that support your growth in data analytics, financial governance, and emerging technologies. The opportunity to work across finance, sourcing, and technology functions, broadening your professional network and cross-functional expertise. Wellbeing support and work-life balance initiatives designed to help you perform at your best. Competitive financial benefits and a rewards package aligned to your experience and contribution. Apply today to bring your data and governance expertise to a role where your analysis shapes commercial outcomes at one of the world's leading financial institutions. If you are a highly motivated, results-oriented individual with a passion for technology risk management, we encourage you to apply! #LI-OD1 ------------------------------------------------------ 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. ## At a glance - Posted by the employer: Oct 29, 2026 - First seen by OpenNash: Nov 3, 2026 - Last checked: Nov 10, 2026 - Listed for: 12 days - Location: Belfast United Kingdom[Apply on Citigroup’s careers site →](https://citi.wd5.myworkdayjobs.com/2/job/Belfast--United-Kingdom/Senior-Java-Applications-Developer_261002575) ## Hiring at Citigroup - Open jobs: 4,725 - New in the last 7 days: After two weekly collections - Tracked since: Jul 10, 2026 [All Citigroup jobs](https://jobs.opennash.com/companies/citigroup/) · [Weekly hiring report](/reports/hiring/) ## More jobs at Citigroup ### [Senior Java Full Stack Developer](https://jobs.opennash.com/companies/citigroup/jobs/6196a7442f9e684176a0/) Belfast United Kingdom ### [Senior Product Developer / Business Analyst - Counterparty Credit Risk Stress Testing](https://jobs.opennash.com/companies/citigroup/jobs/b2b2e583c9653b591fb9/) Belfast United Kingdom ### [Senior Software Engineer (Java Or Python) - VP](https://jobs.opennash.com/companies/citigroup/jobs/2e441d939ee573158e0d/) Belfast United Kingdom ### [Senior Software Engineer - Build AI Tools (Python, GoLang)](https://jobs.opennash.com/companies/citigroup/jobs/c3a3c634b2ca5ce71d36/) Belfast United Kingdom ### [Senior Software Engineer – Ultra Low Latency Risk Engine Developer (VP)](https://jobs.opennash.com/companies/citigroup/jobs/7dc66f359837607e9fdf/) Belfast United Kingdom ## Similar jobs at other companies ### [Full Stack – Java Application Developer (Hybrid) / Développeur(euse) d’applications Java – Full Stack (hybride)](https://jobs.opennash.com/companies/morgan-stanley/jobs/d6bb1b213b51d318d034/) Morgan Stanley · Montreal, Canada ### [Java Software Engineer_Services Orchestration Applications](https://jobs.opennash.com/companies/eurobank/jobs/ea45daa7f01a16b933be/) Eurobank ### [Business Consultant Java Applications & Digitalization (m/w/x)](https://jobs.opennash.com/companies/magna-international/jobs/35ce827cb39797af9a36/) Magna International · Graz, AT ### [Java Azure Developer (Supply Chain Applications)](https://jobs.opennash.com/companies/cognizant/jobs/90d4b5ae7b0d26365868/) Cognizant · Mississauga, W Credit Av, ON, Ontario, Canada ### [Full Stack Developer - Java Applications](https://jobs.opennash.com/companies/solventum/jobs/16f3e7c5875a09df6890/) Solventum · IN, Bangalore Kar [Software Engineering jobs](/functions/software-engineering/) OpenNash lists jobs from employers’ own careers sites and does not handle applications. Dates come from the employer where stated; “first seen” and “last checked” are our own observations. [ OpenNash ](https://opennash.com/) AI-native services firm that builds custom software and 24/7 AI agents. OpenNash Jobs is an OpenNash Applied AI project. [Book time with OpenNash](https://calendly.com/opennash/new-meeting?hide_gdpr_banner=1) Jobs - [Search jobs](https://jobs.opennash.com/search/) - [Companies](https://jobs.opennash.com/explore/) - [Hiring report](https://jobs.opennash.com/reports/hiring/) - [AI assistants](https://jobs.opennash.com/connect/) - [How it works](https://jobs.opennash.com/methodology/) OpenNash - [opennash.com](https://opennash.com/) - [Services](https://opennash.com/ai-agent-consulting/) - [OpenNash CX](https://opennash.com/cx/) - [AI Tools](https://opennash.com/ai-tools/) - [Blog](https://opennash.com/blog/) - [About](https://opennash.com/about/) Contact - [hello@opennash.com](mailto:hello@opennash.com) - [LinkedIn](https://www.linkedin.com/company/opennash) - [Support](https://jobs.opennash.com/support/) - [Privacy](https://jobs.opennash.com/privacy/) - [Terms](https://jobs.opennash.com/terms/) © 2026 OpenNash, Inc. Company names and public job postings belong to their respective owners. Employers control source availability and application decisions.