Senior Java Developer - Fixed Income Algo Tech, VP

Citigroup; Greater London; Hybrid; GBP 62,000 - 102,000; Full time

Benefits offered by this job

27 days annual leave

Discretionary bonus

Private medical care

Life insurance

Employee Assistance Program

Pension plan

Paid parental leave

Employee discounts

Learning resources

Job summary

Citigroup in London seeks a hands-on Java developer to design and build high-performance, low-latency algo trading platform components. You will collaborate with Traders, Quants, and Product Managers to translate requirements into scalable software.

The role requires strong CS fundamentals and experience with Kafka and messaging, Chronicle/Aeron, and distributed caching. Hybrid work up to 2 days at home; competitive salary and benefits.

Qualifications

• Significant hands-on Java development experience in low-latency, high-throughput systems.
• Strong fundamentals in data structures, OO programming, and algorithm analysis.
• Experience with Solace and Kafka messaging.
• Experience with Chronicle and/or Aeron.
• Experience with distributed caching.
• Proven track record in market data and trading applications.
• Experience building back-testing frameworks and handling historical data.
• Linux performance tuning and troubleshooting in Java/Linux stack.
• Familiar with Gradle, Git, TeamCity, Jenkins, Artifactory.
• Strong academic background in CS/Engineering.
• Excellent communication and teamwork in distributed global teams.
• Self-motivated with a drive to deliver.

Responsibilities

• Design and develop reusable algo trading platform components, with a focus on high performance and low latency.
• Collaborate with Traders, Quants, and Product Managers to translate requirements into software enhancements.
• Ensure reliability, scalability, and performance of core algorithmic components.
• Work with wider eTrading Teams and Production Support to maintain live trading systems.
• Adhere to engineering standards and best practices.
• Perform other job-related duties as required.

Skills

Java programming

Low-latency design

Distributed systems

Communication skills

Education

Bachelor's degree in Computer Science

Tools

Git

Gradle

Jenkins

TeamCity

Artifactory

Job description

Salary: £62,000 - 102,000 per year

Requirements

• Significant 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 algorithm complexity analysis.
• Demonstrated experience with messaging technologies such as Solace and Kafka.
• 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 Bachelors degree in Computer Science, Information Science, Engineering, or a related technical or quantitative discipline.
• Strong verbal and written communication skills, with the ability to effectively communicate complex technical concepts to business users.
• Self-motivated 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.

Responsibilities

• 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.
• Perform other job-related duties as required.

Technologies

• Git
• Gradle
• Support
• Java
• Jenkins
• Kafka
• Linux
• Teamcity
• AI
• Network

More

We are Citi, and our Tech team is helping to redefine global finance through systems that matter at scale. Our Fixed Income Algo technology team in EMEA supports our internal market-making and algorithmic trading capabilities for the Spread Product algo trading business. We offer a unique and challenging opportunity to help advance our algo execution platform and deliver next-generation products with direct impact on our clients franchise. Based in London, we provide a business casual workplace with a hybrid working model of up to 2 days working at home per week, a competitive base salary, and benefits including 27 days annual leave plus bank holidays, a discretionary annual performance-related bonus, private medical care and life insurance, an Employee Assistance Program, pension plan, paid parental leave, employee discounts, and access to learning and development resources. We are committed to an inclusive workplace where everyone feels comfortable coming to work as their whole self and can thrive.

last updated 36 week of 2026