Senior Low Latency Java Engineer - Equities Electronic- Execution (eTrading)

Citigroup Inc.; Belfast City District; Hybrid; GBP 85,000 - 120,000; Full time

Benefits offered by this job

27 days annual leave

Discretional annual bonus

Private medical care & life insurance

Employee assistance program

Pension plan

Paid parental leave

Employee discounts

Job summary

Citigroup Inc. in Belfast, United Kingdom seeks a Senior Low Latency Java Engineer to join the Equities Electronic-Execution team.

You will design and deliver a next-generation low-latency execution platform including SOR, DMA, and market data processing, collaborating across traders, quants, and infrastructure to push performance and resiliency. The role requires leadership in high-performance development, with a hybrid work model (up to 2 days at home per week) and a competitive base salary

Qualifications

• Extensive experience with low-latency Java development.
• Strong testing and quality engineering practices.
• Solid Agile and CI/CD experience.
• Knowledge of low-latency system design and high-throughput architecture.
• Ability to work in a global, distributed environment.

Responsibilities

• Core development: design and maintain high-performance, low-latency execution systems.
• Product collaboration: translate trader/quant needs into features and enhancements.
• Testing: improve testing frameworks and environments for reliability and scale.
• AI-Powered SDLC: leverage AI tools to improve productivity and code quality.
• Agile & CI/CD: contribute to shift-left testing and faster releases.
• Platform support: maintain monitoring, reconciliation, and recovery functions.

Skills

LowLatencyJava

Automated testing

Agile methodologies

CI/CD

Concurrency

High-throughput

Communication

C++

Rust

Tools

C++

Rust

Job description

Senior Low Latency Java Engineer - Equities Electronic- Execution (eTrading)

Engineer the future of global finance. At Citi, our Tech teamdoesn’tjust support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countriesoperatingat 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, continuouslearningand 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.

What We do /TheTeam

Equities Technology at Citi is undertaking a bold,multi‑yeartransformation to build abest‑in‑classglobal platform across execution, prime,clearingandcross‑productmargining. We arere‑engineeringour technology estate to achieveworld‑leadingperformance and resiliency, enabling new capabilities in advanced execution, global market connectivity, and modernisedpost‑trade,clearingand margin processes. Our ambition is to deliver a seamlessly integrated, highly automated platform that drives outstanding client outcomes and accelerates growth across our global franchise. As part of the team,you’llcollaborate closely withhigh‑calibreengineers and deeply engaged business and product partners - working together to define and deliver the next generation of Equities technology at Citi.

Role Overview

Citi's Equities Technology organization is seeking aSeniorSoftwareEngineerto join theEquities Electronic- Execution (Electronic Trading)technology team. The person in this role will be responsible for the design, development, and delivery of Citi's next-generation low-latency execution platform. This platform encompasses critical components including Algorithmic Trading, Smart Order Routing (SOR), Dark Pool & Internalization engines, Low latency Client & Exchange Connectivity, and high-throughput market data processing. The senior engineer will collaborate with a cross-functional team of developers and work closely with product development, quantitative research, technology infrastructure, production support and QA teams. Close alignment with the global strategy and cross-regional delivery is a key aspect of this role. This is a leadership role requiring prior experience in building high performance Electronic Trading platforms and leading high performance development teams.

• Core Development:Design,developmentand maintenance of high-performance, low-latency electronic execution systems

• Product Collaboration:Partner with traders, quant researchers, and clients to understand their needs and translate them into innovative product features and enhancements — including execution performance improvements, new liquidity sources, and DMA capabilities.

• Testing:Continuously improve and maintain testing frameworks, development tools, and environments to ensure platform reliability and performance at scale.

• AI-Powered SDLC:Leverage Citi's suite of AI-powered development tools throughout the Software Development Life Cycle (SDLC) to enhance productivity, code quality, and innovation.

• Agile & CI/CD:Contribute to and champion Agile development practices and ContinuousIntegration/ContinuousDelivery (CI/CD) processes with a focus on shift-left testing and accelerated release cycles.

• Platform Support & Enhancement:Build and maintain common solutions for trading platform monitoring, trade reconciliation, application recovery, and other essential support functions.

What you will bring

• Extensive experience with strong technical knowledge andexpertisein LowLatencyJava,

• Strong understanding ofautomated testing techniquesand quality engineering practices.

• Solid understanding ofAgile methodologiesandContinuous Integrationprocesses.

• Familiarity withlow-latency system design, including performance optimization, concurrency, and high-throughput architecture.

• Ability to prioritize multiple tasks, set goals, and meet deadlines in a fast-paced, globally distributed environment.

• Excellent communication skills with a demonstrable ability to present and grasp complex concepts in a multicultural, cross-regional environment.

• Knowledge of regional exchange microstructure and regulatory regimes.

Bonus points for:

• Coupled with extensive Java expertise, added programing skills and experience in C++or Rust would be considered advantageous.

• Priorexperience developingelectronictrading platformsin a global financial institution or equivalent environment.

This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned asrequired.

Whatwe’llprovide you

By joining Citi, 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

Visit our About Us | Culture, Values & 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.

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