Job ID: 99413247936Posted: 2026-08-21Location: London, England, 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.The Fixed Income Algo technology team in EMEA supports Citi’s internal market-making and algorithmic trading capabilities for the Spread Product algo trading business. This is a unique and challenging opportunity for an experienced software engineer to contribute to one of the industry's largest and most sophisticated algorithmic trading platforms. We’re seeking to hire an experienced candidate to advance the algo execution platform creating best-in-class, next-generation products, directly impacting our clients' franchise. This role involves close collaboration with product managers, trading and quants to solve complex business and technology problems, with a direct and measurable impact on business outcomes.Citi is one of the top global dealers on the street in fixed income and contributing to that success is a great opportunity to develop cutting edge technical skills with strong career opportunities. The fixed income business has set out an ambitious growth plan, and strong technical development is critical to achieving our goals and enhancing our leading position.Job Responsibilities / Role: Design and develop reusable algo trading platform components, with a strong focus on high performance and low latency.Collaborate directly with Traders, Quants, and Product Managers to understand business requirements and implement functional enhancements to the algo trading platform.Ensure the strong reliability, scalability, and performance of core algorithmic components.Work seamlessly with wider eTrading Teams and Production Support to maintain and enhance live trading systems.Adhere to stringent engineering standards, continuously striving for best-in-class solutions and practices.Qualifications:Significant extensive hands-on coding experience in core Java, specializing in low-latency, high-throughput distributed applications.Profound understanding of software development fundamentals, data structures, design patterns, object-oriented programming, and algorithms complexity analysis.Demonstrated experience with messaging technologies such as Solace, Kafka, etc.Practical experience with Chronicle and/or Aeron.Experience with distributed caching techniques.Proven track record in implementing and supporting market data processing applications and trading applications.Experience building robust back-testing frameworks and managing historical data.Basic proficiency in Linux system performance tuning and monitoring, with the ability to troubleshoot performance issues within the Java/Linux stack.Familiarity with build tools, including Gradle, Git, TeamCity, Jenkins, and Artifactory.Strong academic record, ideally with a Bachelor’s degree in Computer Science, Information Science, Engineering, or a related technical or quantitative discipline.Competencies:Strong verbal and written communication skills, with the ability to effectively communicate complex technical concepts to business users.A self-motivated individual with a strong determination to achieve goals and drive projects to successful completion.Eagerness to continuously learn and grow, both technically and professionally.Excellent team-working skills and the ability to thrive in a distributed global team environment.Ability to perform effectively and deliver results in a fast-paced environment.Flexible and adaptable, capable of delivering high-quality results within required timeframes.This 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 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 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.#LI-AP2------------------------------------------------------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.