What We do / The Team Equities Technology at Citi is undertaking a bold, multi-year transformation to build a best‑in‑class global platform across execution, prime, clearing and cross‑product margining. We are re‑engineering our technology estate to achieve world‑leading performance and resiliency, enabling new capabilities in advanced execution, global market connectivity, and modernized post‑trade, clearing and margin processes. As part of the team, you’ll collaborate closely with high‑caliber engineers and deeply engaged business and product partners - working together to define and deliver the next generation of Equities technology at Citi.

We are seeking a highly skilled and experienced Java Developer to join our Equities Electronic Trading team. The overall objective of this role is to drive the technical implementation and innovation of our SOR, a critical component of our electronic trading infrastructure, utilizing modern, high-performance Java and microservices architecture. Take a leading role in the design, development, and optimization of high-performance, low-latency microservices and applications, with a primary focus on the Smart Order Router.

Implement and enhance complex routing logic, venue analysis models, and performance optimizations to ensure best execution and system stability. Participate in and lead technical design discussions and conduct rigorous code reviews to ensure the highest standards of quality, performance, and architectural integrity. Partner with product development, quantitative researchers, and other technology teams to deliver current trading capabilities and enhance existing systems.





Drive continuous improvement initiatives in testing frameworks, development tools, and deployment processes for our low-latency and high-throughput environment. Resolve complex technical challenges through in-depth analysis of business requirements, system processes, and industry best practices. Apply expert knowledge of system architecture, data flow, and development standards for coding, testing, debugging, and implementation.

Build and maintain robust solutions for trading platform monitoring, trade reconciliation, and application recovery. 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. Hands‑on experience in software development with a strong focus on high‑performance, low‑latency systems (required) Expert‑level technical knowledge in Core Java, including a deep understanding of JVM internals, concurrency, garbage collection, and memory management in a low‑latency context.





Proven experience designing and developing automated trading systems, specifically with Smart Order Routers in Equities or other similar financial domains (preferred) Solid understanding of financial market protocols (e.g., FIX) and practical experience handling order and market datasets. Demonstrable experience with modern testing frameworks, Agile methodologies, and Continuous Integration/Continuous Delivery (CI/CD) processes. Excellent communication skills with a demonstrable ability to present and grasp complex technical and business concepts.

Familiarity with messaging and data grid technologies (e.g., Bachelor’s degree/University degree Primary Location Full Time Salary Range: $Full time Automated Processing and AI We use automated processing, including artificial intelligence, for our legitimate business interests (or our reasonable and appropriate business purposes) to identify and align the candidate's skills and abilities with a specific job opening. Our automated processing and AI do not involve relying on automatic or autonomous decision-making. 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.

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📌 Java Developer, Equities Trading, Vice President (Mississauga)
🏢 Citi
📍 Mississauga