Senior Java Developer; Smart Order Routing; SOR - Equities Electronic Trading

Senior Java Developer (Smart Order Router (SOR)) - Equities Electronic Trading

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.

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 modernised post‑trade, clearing and 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’ll collaborate closely with high‑calibre 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 Smart Order Router (SOR) Developer to join our Equities Electronic Trading team. This is a VP‑level position responsible for the design, development, and optimization of our core low‑latency execution platform. 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, primarily focusing 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 new 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.

• Hands‑on experience in software development with a strong focus on high‑performance, low‑latency systems.
• 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.
• Solid understanding of financial market protocols (e.g., FIX) and practical experience handling order and market datasets.
• Experience with microservices architecture and developing distributed systems.
• Demonstrable experience with modern testing frameworks, Agile methodologies, and Continuous Integration/Continuous Delivery (CI/CD)…