We are seeking a highly skilled and experienced Algo Trader Senior Developer to contribute to the strategic analytics backbone and low-latency execution platforms supporting our Equities Electronic Trading product. This is a senior level position responsible for the design, development, and optimization of critical application systems and programs, working in coordination with the Citi Equities Electronic Trading Technology team. The overall objective of this role is to drive technical implementation and innovation across our analytics and data subsystems, as well as the core trading engine, while providing technical leadership.

Responsibilities:

• Lead technical design discussions and conduct rigorous code reviews to ensure high quality, performance, and adherence to architectural standards for critical trading systems.
• Design, develop, and optimize high-performance, low-latency applications utilizing both KDB+/Q and Java for our Equities Electronic Trading platform.
• Implement and maintain business-critical high-frequency systems that process market data, generate analytics, and facilitate trading operations.
• Contribute to platforms enabling efficient data management, sophisticated analytics generation, and robust trading functionalities.
• Partner with product development, quantitative researchers, and other technology teams to deliver new trading capabilities and enhance existing systems.
• Drive continuous improvement initiatives in testing frameworks, development tools, and deployment processes for low-latency and high-throughput environments.
• Resolve complex technical challenges through in-depth analysis of business and system processes, adhering to industry best practices and architectural blueprints.
• Apply advanced knowledge of system architecture, data flow, and development standards for coding, testing, debugging, and implementation.
• Build common solutions for trading platform monitoring, trade reconciliation, and application recovery.
• Provide technical guidance and mentorship to other developers, fostering best practices in high-performance application development.
• 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.

Qualifications:

• Minimum 8+ years of hands-on experience in software development with a strong focus on high-performance, low-latency systems.
• Proven expertise in KDB+ (Q language) development, including practical experience in scaling, load-balancing, resilience, and optimizing query performance for large datasets.
• Strong technical knowledge and expertise in Java (or C#) for building critical, low-latency execution platforms, including deep understanding of JVM internals, concurrency, and memory management.
• Experience designing and developing automated trading platforms in Equities or other similar financial domains.
• Solid understanding of financial market protocols like FIX, and practical experience handling order and market datasets.
• Demonstrable experience with testing frameworks, Agile methodologies, and Continuous Integration/Continuous Delivery (CI/CD) processes.
• Ability to prioritize multiple tasks, set goals, and meet deadlines in a fast-paced environment.
• Excellent communication skills with a demonstrable ability to present and grasp complex technical and business concepts.
• Preferred background in Markets Electronic Trading or Market Making domains.

Education:

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

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:

$176,720.00 - $265,080.00
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.

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:

Apr 30, 2026

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