Low Latency Java Engineer

The Applications Development Technology Lead Analyst is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology team. The overall objective of this role is to lead applications systems analysis and programming activities.

Responsibilities:

• •Partner with multiple management teams to ensure appropriate integration of functions to meet goals as well as identify and define necessary system enhancements to deploy new products and process improvements
• •Resolve variety of high impact problems/projects through in-depth evaluation of complex business processes, system processes, and industry standards
• •Provide expertise in area and advanced knowledge of applications programming and ensure application design adheres to the overall architecture blueprint
• •Utilize advanced knowledge of system flow and develop standards for coding, testing, debugging, and implementation
• •Develop comprehensive knowledge of how areas of business, such as architecture and infrastructure, integrate to accomplish business goals
• •Provide in-depth analysis with interpretive thinking to define issues and develop innovative solutions
• •Serve as advisor or coach to mid-level developers and analysts, allocating work as necessary
• •Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency.

Recommended Qualifications:

• •6-10 years of relevant experience in Apps Development or systems analysis role
• •Extensive experience system analysis and in programming of software applications
• •Experience in managing and implementing successful projects
• •Subject Matter Expert (SME) in at least one area of Applications Development
• •Ability to adjust priorities quickly as circumstances dictate
• •Demonstrated leadership and project management skills
• •Consistently demonstrates clear and concise written and verbal communication

Education:

• •Bachelor’s degree/University degree or equivalent experience
• •Master’s degree preferred

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

Low Latency Java Engineer

Engineer 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.

What We do / The Team

This is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology Team. The overall objective of this role is to lead applications systems analysis and programming activities.

The role is to provide senior, low-latency systems and application framework engineering (skilled in Java, C++ , Rust, KDB, market data, algorithmic trading technology) within the London Based High Performance Architectures (HPA ) team. The team require a specialist on algorithmic trading systems utilities including but not limited to market data replay and back test/simulation utilities. The HPA organization are a high skilled enablement group of Subject Matter experts - who produce application frameworks and engage with application engineers to enable application Modernisation to over 100 teams across Citi with a concentration on low latency eTrading platforms in Markets Technology.

Responsibilities include (but not limited to):

• •90% hands in the Java or Rust codebase. We build microservices based event sourcing systems on a low latency in-house framework. Response times in the 10 microsecond to 100 microsecond range.
• •Lead integration of functions to meet goals, deploy new products, and enhance processes
• •Analyse complex business processes, system processes, and industry standards to define and develop solutions to high level problems
• •Provide world class expertise in area of Java low latency development.
• •Utilize advanced knowledge of supported main system flows and comprehensive knowledge of multiple areas to achieve technology goals
• •Consult with end users to identify system function specifications and incorporate into overall system design
• •Influence and negotiate with senior leaders and communicate with external parties
• •Happy to work with and educate and support/mentor Junior developers and less experienced senior Java developers.

Key Skills and Experience required

• •Demonstrated Subject Matter Expert (SME) in area(s) of Applications Development
• •In-depth experience with Algorithmic Trading application development, preferably in low latency environment
• •Detailed comprehension and experience with Market Data handling and associated technologies (such as time-series databases e.g. KDB)
• •Demonstrated leadership, project management, and development skills
• •Passion for coding excellent, commercial grade, mission critical Java frameworks based on event sourcing microservices.
• •Complete knowledge of modern Java, the JVM, the Linux Operating system, system calls and Kernel.
• •Knowledge of TCP and other IP based network protocol technologies including hardware accelerated kernel bypass e.g. Solarflare OpenOnload
• •Performance assessment and targeted tuning.
• •Design and architectural elegance.
• •Experience in implementing projects
• •Great communicator with high EQ.
• •Ability to occasionally produce clear diagrammatic documentation and model key aspects in UML sequence diagrams.
• •Relationship and consensus building skills

Nice to have

Background in C++

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

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Job Family Group:

Technology ------------------------------------------------------

Job Family:

Applications Development ------------------------------------------------------

Time Type:

Full time ------------------------------------------------------

Primary Location:

Jersey City New Jersey United States ------------------------------------------------------

Primary Location Full Time Salary Range:

• $142,320.00 - $213,480.00
• In addition to salary, Citi’s offerings may also include, for eligible employees, discretionary and formulaic incentive and retention awards. Citi offers competitive employee benefits, including: medical, dental & vision coverage; 401(k); life, accident, and disability insurance; and wellness programs. Citi also offers paid time off packages, including planned time off (vacation), unplanned time off (sick leave), and paid holidays. For additional information regarding Citi employee benefits, please visit citibenefits.com. Available offerings may vary by jurisdiction, job level, and date of hire.

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Most Relevant Skills

Please see the requirements listed above. ------------------------------------------------------

Other Relevant Skills

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

Anticipated Posting Close Date:

Oct 09, 2026 -------------