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Fixed Income eTrading Connectivity – Senior Developer

United Kingdom, London · Job Posted April 11, 2026
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Job Description

The Fixed Income Connectivity team globally supports connectivity and routing solutions to ECN platforms and clients. This is achieved using a mixture of Direct FIX API connections and a variety of vendors APIs/Platforms. We’re seeking to hire an experienced candidate to join the connectivity team in creating a best in class, next generation product for our connectivity needs. The role will involve contributions to the global build-out, as well as maintaining a strong partnership with both internal and external stakeholders. This is a challenging and exciting opportunity to transform the connectivity landscape at Citi. It will involve working directly with internal and external partners to solve both business and technology problems with a direct measurable impact on the business.

Job Responsibility

  • Designing and developing front office eTrading applications for the trading business
  • Understanding of good design principles and ability to adhere to complex design
  • Development of common, reusable components and services utilizing Citi’s best practices
  • Responsible for creating high performance, low latency applications leveraging existing Citi frameworks
  • Ensuring strong reliability, scalability and performance of the core application components
  • Drive architecture and execute on our technical strategy while partnering with various technology teams and to continue to evolve technical architecture roadmap beyond near term objectives
  • Coordinate development with both internal technology teams and Traders, Sales, and Quants
  • Driving engineering standards and continuing to strive for best – whilst utilizing creativity and innovation to improve the technical capabilities of the platform and ensuring it remains stable, flexible, and maintainable
  • Troubleshooting challenging performance and scalability issues
  • Assisting in third line support during core trading hours while working with other e-Trading teams to manage and support the applications

Requirements

  • Extensive hand-on coding expertise in C+++ and Core Java, Mult-threading and Concurrency
  • Strong focus on system performance tuning and experience with low latency programming techniques
  • Strong academic record, ideally with a Bachelors or Masters degree in Computer Science, engineering or related technical or quantitative discipline
  • Demonstrable success in designing and delivering complex applications
  • Strong software development fundamentals, data structures, design patterns, Object-Oriented programming, architecture, algorithms, and problem-solving skills
  • Solid understanding of service architecture and high performance, low latency, and multithreading techniques
  • Experience of developing market connectivity applications is highly desirable
  • Prior experience in building e-trading systems is highly desirable
  • Knowledge of any financial products like Interest Rates, Spread Products, FX, Equities or Futures (e.g. bonds, interest rate swaps, repos) is highly desirable
  • Technical skills include Java, Spring, FIX, Aeron, Solace, Chronicle, TDD, BDD, KDB, REST, Gradle, Git and Unix Scripting
  • Strong verbal and written communication skills
  • ability to face off to business users
  • Self-motivated individual and with determination to achieve goals
  • Willingness to learn, both technically and professionally
  • Strong analytical and problem solving skills
  • Good team working skills and ability to work in a distributed global team environment
  • Ability to work on a fast-pace environment
  • Flexible and able to deliver quality results in the required timeframe

Nice to have

  • Any exposure to systems programming (e.g. Rust ) would be useful
  • Experience of developing market connectivity applications is highly desirable
  • Prior experience in building e-trading systems is highly desirable
  • Knowledge of any financial products like Interest Rates, Spread Products, FX, Equities or Futures (e.g. bonds, interest rate swaps, repos) is highly desirable

What we offer

  • 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

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