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Salary
≈ $64k – $154k per year (Estimated)
Location
Hybrid (Belfast, United Kingdom)
Employment
Full-Time

Confirmed on the employer's own hiring board on Sep 29, 2026. First seen by Alion on Sep 28, 2026. Citi scores A on the Alion truth index.

Overview
Company
Impact
Profile match
Citi is one of the largest banks in the world, tracing its lineage to the City Bank of New York founded in 1812 and taking its modern shape through the 1998 merger that created Citigroup. Its most distinctive asset is a cross-border payments and treasury network unmatched by any competitor, moving trillions of dollars a day for multinational corporations, governments and other banks across roughly ninety countries. Alongside that institutional franchise it runs markets and investment banking, wealth management and a United States personal bank, and has spent recent years simplifying itself by exiting consumer operations across Asia, Europe and Latin America.

Citi 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 OR C++
  • 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.

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Job Family Group:

Technology

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Job Family:

Applications Development

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Time Type:

Full time

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Most Relevant Skills

Please see the requirements listed above.

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Other Relevant Skills

For complementary skills, please see above and/or contact the recruiter.

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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.

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