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Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. Citi is looking to hire a KDB+ Software Engineer into its Equities Global Data and Analytics group in Belfast , UK. This role involves designing, implementing, and deploying timeseries based software systems that offer our Equities Trading Clients with best-in-class Analytics. The engineer will be part of the Global team that captures trading, market data and computes pre-trade, at trade and post-trade analytics. • Drive the design and development of real-time market data and analytics systems, leading KDB+/q development for trading and analytics platforms., • Own technical delivery, and collaborate with Traders, Quants, and Global Technology teams to build high-performance, low-latency solutions., • Utilize advanced knowledge of system flow and develop standards for coding, testing, debugging, and implementation, • Develop comprehensive knowledge of how areas of business, such as architecture and infrastructure, integrate to accomplish business goals, • Appropriately assess risk when business decisions are made, demonstrating consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency, • Conduct tasks related to feasibility studies, time and cost estimates, applications development, model development, and establish and implement new or revised applications systems and programs to meet specific business needs or user areas, • Monitor and control all phases of development process and analysis, design, construction, testing, and implementation as well as provide user and operational support on applications to business users, • Consult with users/clients and other technology groups on issues, recommend advanced programming solutions, and install and assist customer exposure systems, • Has the ability to operate with a limited level of direct supervision., • Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency., • Significant relevant experience, • Proven experience working in KDB+/q, • KDB+ proficiency: Deep understanding and experience with KDB+ databases and the Q programming language., • Programming Languages: Strong skills in Q/KDB+, Java and Python/PyKX,, • Good understanding of Linux/UNIX, OS tuning, • Knowledge of TCP/IP, UDP, Multicast and exchange specific protocols (FIX, OUCH, ITCH), • Proven track record in profiling and optimizing for latency, • Strong debugging and trouble shooting skills, especially under production load, • Experienced in working within an agile framework to ensure timely product delivery, • Understanding of Market Microstructure, Connectivity, Smart Order Routers, Algorithmic Trading Systems will be a plus., • Bachelor’s degree/University degree or equivalent experience This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required. • 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 Visit our Global Benefits page to learn more. 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. 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. #J-18808-Ljbffr

Citi Belfast is hiring a KDB+ Software Engineer to design and deploy timeseries-based analytics for Equities Trading Clients. You will join a Global team delivering real-time market data systems, with a focus on low-latency performance and scalable analytics. Strong KDB+/Q, Java and Python skills are required, along with Linux/UNIX expertise. The role offers hybrid work up to 2 days remote per week, a competitive base salary, and comprehensive benefits. #J-18808-Ljbffr

Citi Belfast is seeking a KDB+ Software Engineer to design and deploy timeseries analytics for Equities clients. You will work with a global team to deliver high-performance, low-latency market data systems and analytics, aligning with enterprise standards and risk controls. You will collaborate with Traders, Quants, and Global Tech to push the boundaries of tech in finance, with opportunities for hybrid work and continuous learning across the Citi Tech organization. #J-18808-Ljbffr

Trade Management Services Senior Business Analyst - Vice PresidentApplyremote type: Hybridlocations: Belfast United Kingdomtime type: Full timeposted on: Posted Yesterdayjob requisition id: 26983603Team/Role OverviewJoin Citi's Global Business Expense Transparency organization as a Capital Markets Business/Data Analyst. You'll drive the development and enhancement of our Trade Cost Calculator and Analytics platform—a best-in-class system providing critical insights into trading costs and activities across global markets. This senior role requires a seasoned capital markets professional who can drive platform strategy, manage complex stakeholder relationships, and deliver sophisticated analytics that optimize transaction expense management across the enterprise.Key ResponsibilitiesPlatform Leadership & Development Lead development initiatives for the VARCITI trade cost analytics platform Design and deliver robust trade and cost analytics, including volume profiling, product analysis, and expense trend identification Develop and refine reconciliation processes for trade expense analytics against third-party invoicesStrategic Stakeholder Engagement Partner with Front Office, Middle Office, Operations, and Technology teams to understand dependencies and design effective metrics Provide analytical guidance and strategic recommendations to global efficiency, business transparency, and operations teams Communicate confidently with stakeholders at all levels, from trading desks to senior managementRequirements & Project Delivery Manage business requirements and projects throughout the software delivery lifecycle, ensuring timely release of new features Gather and analyse requirements for new metrics, reporting enhancements, and onboarding requests* Drive process improvements to increase transparency and accuracy in expense reporting and management intelligenceWhat we’ll need from youExperience & Domain Expertise Advanced experience in business analysis, trade cost analytics, financial systems, or related fields within competitive, fast-paced environments Capital Markets experience with solid understanding of: + Trading products and trade lifecycle + Front-to-back office workflows + Market structure across asset classes (equities, fixed income, FX, derivatives)Technical Skills Strong database development capabilities: RDBMS and NoSQL Database administration (DBA) experience and/or certifications Advanced proficiency in MS Excel and PowerPoint Experience with Qlik/Tableau or similar data visualization tools Project management or technology-related qualifications (e.g., Agile, Scrum Master, PMP)Core Competencies Exceptional analytical skills and mathematical problem-solving capability Strong interpersonal and stakeholder management abilities Meticulous attention to detail and commitment to maintaining standards Highly organized with capability to work effectively across regional and global teams Self-motivated with enthusiastic, proactive approach Confident working independently and collaborating with business and IT subject matter experts Appreciation for diverse perspectives and ability to leverage differences for organizational success* Bachelor's degree or equivalent experience required------------------------------------------------------## Job Family Group:Corporate Services------------------------------------------------------## Job Family:Supply Chain------------------------------------------------------## Time Type:Full time------------------------------------------------------## Most Relevant SkillsPlease see the requirements listed above.------------------------------------------------------## Other Relevant SkillsFor 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. #J-18808-Ljbffr

Markets Program Management Lead - Vice PresidentApply: Hybrid: Belfast United Kingdom: Full time: Posted Today: End Date: September 25, 2026 (13 days left to apply): 26988870Are you looking for a career move that will put you at the heart of a global financial institution? Then bring your skills in analysis, problem-solving, and communication to a dynamic Markets Program Execution team.By joining a leading global financial institution, you will become part of an organization whose mission is to serve as a trusted partner to clients by responsibly providing financial services that enable growth and economic progress.Role Overview:The Program Execution team is responsible for managing strategic transformation programs within the Markets Business, encompassing both regulatory and business-driven initiatives. This role offers the opportunity to contribute to change initiatives across the Markets organization. You will work alongside various internal stakeholders including Front Office, Risk, Operations, Technology, and Compliance teams globally, ensuring effective collaboration and delivery of key programs. This is an excellent opportunity to expand your expertise in both technical and business subject matters within a fast-paced environment.## What you'll do:This role offers a unique opportunity to drive high-impact projects within our strategic Markets portfolio, contributing directly to critical business growth and regulatory change initiatives. You will operate at the intersection of business strategy, financial engineering, and technology, collaborating with global, regional, and local colleagues across front-to-back functions.* Drive End-to-End Delivery: Lead the execution of complex projects across our global Markets business (covering Equities, Fixed Income, Credit, Commodities, and FX), taking ownership of timelines, budgets, resource allocation, and scope management.* Bridge Business and Technology: Partner closely with Front Office trading desks, Risk Management, Operations, and Technology teams to dissect complex market requirements, map technical data flows, and define precise project scopes and success metrics.* Proactively Manage Risks & Dependencies: Identify, track, and mitigate project risks, technical bottlenecks, and cross-asset dependencies. Translate complex technical and operational issues into clear, actionable status reports and decision frameworks for senior leadership.* Orchestrate Readiness & Testing: Lead comprehensive business and technical readiness activities, including cross-functional training, stakeholder communications, and the coordination of complex User Acceptance Testing (UAT) across front-to-back trading and risk systems.* Maintain Rigorous Governance: Ensure all project documentation is complete, structured, and auditable. Maintain detailed project plans, functional specifications, and risk/issue logs in compliance with internal governance and external regulatory standards.## What we'll need from you:We are looking for a highly motivated, delivery-focused professional who possesses a deep understanding of financial markets, strong technical literacy, and the ability to lead diverse, cross-functional teams.* Markets Domain Expertise: Proven experience in project management, business analysis, or a similar delivery-focused role within a global Markets environment, with a track record of delivering initiatives across Equities, Fixed Income, Credit, Commodities, or FX.* Financial Product Knowledge: A strong fundamental understanding of capital markets, including trading lifecycles (front-to-back), market structures, pricing, and risk management principles across multiple asset classes.* Technical Literacy: Strong analytical and technical understanding; ability to comprehend system architectures, data models, APIs, and trading/risk platforms, enabling you to collaborate effectively with software engineers, quantitative analysts, and database administrators.* Control & Regulatory Experience: Experience delivering projects that impact control structures, regulatory compliance (e.g., Basel, MiFID, Dodd-Frank), or operational risk frameworks within a trading environment.* Analytical Problem-Solving: Strong analytical capabilities, with a first-principles approach to dissecting complex business processes, identifying root causes of technical issues, and proposing structured, scalable solutions.* High-Impact Communication: Strong verbal and written communication skills, with the ability to articulate complex technical and financial concepts clearly to both business leaders and technical teams, fostering alignment and collaboration.* Academic Foundation: Bachelor’s/University degree in a technical or financial discipline (e.g., Computer Science, Engineering, Finance, Economics) or equivalent practical experience.What we can offer you:We work hard to have a positive financial and social impact on the communities we serve. In turn, we put our employees first and provide the best-in-class benefits they need to be well, live well and save well.By joining Citi Belfast, 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: Generous holiday allowance starting at 27 days plus bank holidays; increasing with tenure A discretional annual performance related bonus Private medical insurance packages to suit your personal circumstances Employee Assistance Program Pension Plan Paid Parental Leave Special discounts for employees, family, and friends Access to an array of learning and development resourcesAlongside 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.Sounds like Citi has everything you need? Then apply to discover the true extent of your capabilities. #J-18808-Ljbffr

Team/Role Overview Join Citi's Global Business Expense Transparency organization as a Capital Markets Business/Data Analyst. You'll drive the development and enhancement of our Trade Cost Calculator and Analytics platform—a best-in-class system providing critical insights into trading costs and activities across global markets. This senior role requires a seasoned capital markets professional who can drive platform strategy, manage complex stakeholder relationships, and deliver sophisticated analytics that optimize transaction expense management across the enterprise. Key Responsibilities Platform Leadership & Development • Lead development initiatives for the VARCITI trade cost analytics platform, • Design and deliver robust trade and cost analytics, including volume profiling, product analysis, and expense trend identification, • Develop and refine reconciliation processes for trade expense analytics against third-party invoices Strategic Stakeholder Engagement • Partner with Front Office, Middle Office, Operations, and Technology teams to understand dependencies and design effective metrics, • Provide analytical guidance and strategic recommendations to global efficiency, business transparency, and operations teams, • Communicate confidently with stakeholders at all levels, from trading desks to senior management Requirements & Project Delivery • Manage business requirements and projects throughout the software delivery lifecycle, ensuring timely release of new features, • Gather and analyse requirements for new metrics, reporting enhancements, and onboarding requests, • Drive process improvements to increase transparency and accuracy in expense reporting and management intelligence What we’ll need from you Experience & Domain Expertise • Advanced experience in business analysis, trade cost analytics, financial systems, or related fields within competitive, fast-paced environments, • Capital Markets experience with solid understanding of:, • Trading products and trade lifecycle, • Front-to-back office workflows, • Market structure across asset classes (equities, fixed income, FX, derivatives) Technical Skills • Strong database development capabilities: RDBMS and NoSQL, • Database administration (DBA) experience and/or certifications, • Advanced proficiency in MS Excel and PowerPoint, • Experience with Qlik/Tableau or similar data visualization tools, • Project management or technology-related qualifications (e.g., Agile, Scrum Master, PMP) Core Competencies • Exceptional analytical skills and mathematical problem-solving capability, • Strong interpersonal and stakeholder management abilities, • Meticulous attention to detail and commitment to maintaining standards, • Highly organized with capability to work effectively across regional and global teams, • Self-motivated with enthusiastic, proactive approach, • Confident working independently and collaborating with business and IT subject matter experts, • Appreciation for diverse perspectives and ability to leverage differences for organizational success, • Bachelor's degree or equivalent experience required Corporate Services Supply Chain Full time Please see the requirements listed above. 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. #J-18808-Ljbffr

Citi in Belfast is seeking a Senior/VP level Equities Technology developer to advance the Global Market Data platform with ultra-low latency capabilities. You will contribute to design and implement low-latency market data functionality and work closely with floor traders, production support and other teams to diagnose real-world issues. The role emphasizes Java development, microservices, scripting, and a strong understanding of network protocols. #J-18808-Ljbffr

Citi Global Markets provides world-class solutions and an unmatched global presence. Citi Global Markets serve corporates, institutional investors and governments from trading floors in almost 80 countries. The strength of our underwriting, sales and trading and distribution capabilities span asset classes (Commodities, Equities, Rates, Spread Products) and currencies, providing an unmatched ability to meet the needs of our clients. The 1st Line of Defence (1LOD) Markets Controls Testing team is part of Central Control Organisation supporting the Markets business, and is responsible for execution of a comprehensive, risk-based programme of control testing covering all Markets businesses globally. The primary mission of the 1LOD Markets Controls Testing team is to support Management in its continuous monitoring of its control framework and residual risk profiles, thereby supporting responsible provision of financial services to clients and effective risk management for the firm. This position reports to the Global Markets Control Testing Programme Head, within the Central Testing Utility. The Global Markets Control Testing Programme Head leads and directs a team of approximately 100 controls testing professionals responsible for supporting the above responsibilities, with breadth and depth on control testing planning and execution. • Executing and reporting results of control testing, • Supervising and coaching junior team members in execution of control testing, • Monitoring execution of parts of the testing programme to agreed timelines, escalating and resolving obstacles to delivery, • Maintaining high standards and best practice for execution of testing activities, • Providing challenge to stakeholders on the design and effectiveness of controls, • Supporting stakeholders in determining necessary control remediation identified through the testing programme, • Maintaining strong stakeholder relationships across Front Office, Markets Conduct Risk, Compliance and Operational Risk, • Presenting impactful summary outputs from the testing programme to stakeholders, • Providing Markets controls subject matter expertise to stakeholders across all three lines of defence Relevant experience in Front Office controls testing, internal audit, external audit, independent control reviews, or similar disciplines Understanding of Markets business activities and associated regulations Knowledge of Markets Operational and Compliance risks, and related controls, associated with trading and sales activities Strong understanding of control design assessment and effectiveness testing techniques and practices Experience of coaching and developing team members Experience of overseeing a team to deliver rigor and attention to detail in execution Experience of developing and maintaining effective senior stakeholder relationships Track record of providing constructive, effective challenge to Senior Stakeholders on risk management matters. Bachelor / university education preferred, but appropriate industry experience & exceptional delivery track record is as important. Controls Governance & Oversight Quality Assurance, Monitoring & Testing Full time Analytical Thinking, Assurance Strategy, Constructive Debate, Controls Assessment, Controls Lifecycle, Digital Skills (Including AI), Policy, Procedure, and Regulation, Risk Remediation, Stakeholder Management. 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. #J-18808-Ljbffr

KDB+ Software Engineer - Vice PresidentApply: Hybrid: Belfast United Kingdom: Full time: Posted Today: 26990813Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.Citi is looking to hire a KDB+ Software Engineer into its Equities Global Data and Analytics group in Belfast , UK. This role involves designing, implementing, and deploying timeseries based software systems that offer our Equities Trading Clients with best-in-class Analytics. The engineer will be part of the Global team that captures trading, market data and computes pre-trade, at trade and post-trade analytics. Responsibilities: Drive the design and development of real-time market data and analytics systems, leading KDB+/q development for trading and analytics platforms. Own technical delivery, and collaborate with Traders, Quants, and Global Technology teams to build high-performance, low-latency solutions. Utilize advanced knowledge of system flow and develop standards for coding, testing, debugging, and implementation Develop comprehensive knowledge of how areas of business, such as architecture and infrastructure, integrate to accomplish business goals Appropriately assess risk when business decisions are made, demonstrating consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency Conduct tasks related to feasibility studies, time and cost estimates, applications development, model development, and establish and implement new or revised applications systems and programs to meet specific business needs or user areas Monitor and control all phases of development process and analysis, design, construction, testing, and implementation as well as provide user and operational support on applications to business users Consult with users/clients and other technology groups on issues, recommend advanced programming solutions, and install and assist customer exposure systems Has the ability to operate with a limited level of direct supervision. Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency.Recommended Qualifications: Significant relevant experience Proven experience working in KDB+/q KDB+ proficiency: Deep understanding and experience with KDB+ databases and the Q programming language. Programming Languages: Strong skills in Q/KDB+, Java and Python/PyKX, Good understanding of Linux/UNIX, OS tuning Knowledge of TCP/IP, UDP, Multicast and exchange specific protocols (FIX, OUCH, ITCH) Proven track record in profiling and optimizing for latency Strong debugging and trouble shooting skills, especially under production load Experienced in working within an agile framework to ensure timely product delivery Understanding of Market Microstructure, Connectivity, Smart Order Routers, Algorithmic Trading Systems will be a plus.Education:* Bachelor’s degree/University degree or equivalent experienceThis job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.What we’ll provide youBy joining Citi Belfast, 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 resourcesVisit our Global Benefits page to learn more.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. #J-18808-Ljbffr

About Citi Markets At Citi Markets, we win together. In a rapidly changing world, our shared vision gives us the clarity, agility and global perspectives we need to shape the future. That’s why collaboration plays a central role in how we deliver for clients, develop our people, and grow our business. Our operation is uniquely global. Our client list is remarkably varied. Our product range is incredibly broad. But we’re not the finished article. We have big ambitions for the future and all the resources we need to reach them, including some of the smartest people in the industry. Citi Markets operates across fixed income, currencies, commodities, equities, and prime finance, providing institutional clients worldwide with comprehensive sales, trading, and risk management solutions. Responsibilities: • Build, maintain and enhance dashboards and Counterparty Credit Risk (CCR) exposure tools to support the business during crisis management, internal innovation initiatives and regulatory engagements., • Support broader projects across the Counterparty Trading & Risk group, providing analysis and investigations related to Counterparty Credit Risk and XVA Trading., • Demonstrate the ability to quickly grasp new concepts, solve complex problems and think creatively., • Effectively manage competing priorities and deliver against time-sensitive deadlines in a fast-paced environment., • Build strong working relationships and collaborate effectively with a wide range of stakeholders across XVA Trading, ICM, Risk, Operations and Technology., • Identify opportunities to integrate AI-driven innovation into existing dashboards, analytical tools and processes, enhancing efficiency and decision-making. Qualifications: • Advanced SQL and Tableau skills are essential; experience with Python or other programming languages would be advantageous., • Strong analytical and quantitative skills, with the ability to interpret complex data and solve problems effectively., • Excellent attention to detail, with a strong focus on accuracy and quality., • Demonstrated ability to work collaboratively both within the immediate team and across broader functions., • Ability to quickly grasp new concepts, think creatively and develop innovative solutions., • Agility to thrive in a fast-paced, high-performance trading environment, • Ideally, a good understanding of and comfort working with derivatives modelling concepts. Education: • Bachelor’s/University degree or equivalent experience This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required. What Citi Can Offer You By joining Citi London, 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. Technology Data Science Full time Please see the requirements listed above. 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. #J-18808-Ljbffr

Equities Technology (Low Latency Developer) - VPApplylocations: Belfast United Kingdomtime type: Full timeposted on: Posted Todayjob requisition id: 26977601Citi 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.What We do / The Team Development of the Global Market Data platform to meet the requirements of the Global Equities business. Support for deployed market data systems in conjunction with Equities Production Support teams. Implementation and enhancement of new/altered systems. Working with a business group who are committed to technology and receiving low latency market data. Design and development of the Global Market Data platform in EMEA. Design and development of system functionality. Coordination of Exchange mandatory changes as they pertain to the Global Market Data platform. Application functionality improvements driven primarily by the Electronic Trading Desk.* Support for existing Market Data applications and clients.Role Overview/What will you do:* On-going development of new functionality for the Global Market Data platform. The Global Market Data platform is evolving rapidly, offering many opportunities to exercise and improve technical skills in the area of low latency. The role also offers the opportunity to learn the Equity Trading business.Key Skills and Experience required: Significant years of working knowledge of Java. Also, Perl/Shell Scripting. Working experience of Microservices architecture is a big plus. Knowledge and experience in building ultra-low latency market data platform will be a big plus. Ability to work to tight deadlines as part of a team. Ability to work with floor traders, production support and others in diagnosing and troubleshooting real-world issues. Candidate must be able to work effectively as part of a larger team and be able to communicate at an appropriate level depending on the types of people involved.* Good understanding of Network Protocols – Multicast/TCP/IP.Any Beneficial / Nice to have skills and experience: Low Latency Market Data Skills. Experience of algorithmic trading and electronic trading business or technology would be beneficial, but not essential. Experience of working in the finance industry would be beneficial but not essential. Sound programming approach with unit test testing, code reviews and following agile methodology. JIRA, Confluence, GIT, uDeploy all beneficial to know. Low latency, network concurrency, multicast, and server configuration knowledge are additional useful skills. Including configuration of 10GB Network Interfaces such as SolarFlare using OnLoad. Knowledge of Equities products (stock, futures, options, swaps etc) would be beneficial. Knowledge of developing database code and processes in KDB.------------------------------------------------------## Job Family Group:Technology------------------------------------------------------## Job Family:Applications Development------------------------------------------------------## Time Type:Full time------------------------------------------------------## Most Relevant SkillsPlease see the requirements listed above.------------------------------------------------------## Other Relevant SkillsFor 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. #J-18808-Ljbffr

Job ID: 100629734256Posted: 2026-09-14Location: Belfast, Northern Ireland, United KingdomCategory: Technology, Applications Development, ProfessionalCompany: CitiEngineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.Citi is looking to hire a KDB+ Software Engineer into its Equities Global Data and Analytics group in Belfast , UK. This role involves designing, implementing, and deploying timeseries based software systems that offer our Equities Trading Clients with best-in-class Analytics. The engineer will be part of the Global team that captures trading, market data and computes pre-trade, at trade and post-trade analytics.Responsibilities:Drive the design and development of real-time market data and analytics systems, leading KDB+/q development for trading and analytics platforms.Own technical delivery, and collaborate with Traders, Quants, and Global Technology teams to build high-performance, low-latency solutions.Utilize advanced knowledge of system flow and develop standards for coding, testing, debugging, and implementationDevelop comprehensive knowledge of how areas of business, such as architecture and infrastructure, integrate to accomplish business goalsAppropriately assess risk when business decisions are made, demonstrating consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparencyConduct tasks related to feasibility studies, time and cost estimates, applications development, model development, and establish and implement new or revised applications systems and programs to meet specific business needs or user areasMonitor and control all phases of development process and analysis, design, construction, testing, and implementation as well as provide user and operational support on applications to business usersConsult with users/clients and other technology groups on issues, recommend advanced programming solutions, and install and assist customer exposure systemsHas the ability to operate with a limited level of direct supervision.Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency.Recommended Qualifications:Significant relevant experienceProven experience working in KDB+/qKDB+ proficiency: Deep understanding and experience with KDB+ databases and the Q programming language.Programming Languages: Strong skills in Q/KDB+, Java and Python/PyKX,Good understanding of Linux/UNIX, OS tuningKnowledge of TCP/IP, UDP, Multicast and exchange specific protocols (FIX, OUCH, ITCH)Proven track record in profiling and optimizing for latencyStrong debugging and trouble shooting skills, especially under production loadExperienced in working within an agile framework to ensure timely product deliveryUnderstanding of Market Microstructure, Connectivity, Smart Order Routers, Algorithmic Trading Systems will be a plus.Education:Bachelor’s degree/University degree or equivalent experienceThis job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.What we’ll provide youBy joining Citi Belfast, 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 bonusPrivate Medical Care & Life InsuranceEmployee Assistance ProgramPension PlanPaid Parental LeaveSpecial discounts for employees, family, and friendsAccess to an array of learning and development resourcesVisit our Global Benefits page to learn more.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.

Guide development efforts, mentor junior developers, and ensure code quality, security, and performance.

In this role you will advance Citi’s Global Market Data platform for the global equities business, focusing on low-latency data delivery and system enhancements.

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