Senior Low Latency Java Engineer

Overview

As a Senior Low Latency Java Engineer, you will lead the development and modernization of high-performance trading systems within Citi’s HPA team. You’ll build and optimize low-latency Java solutions, collaborate with cross-functional peers, and mentor junior developers. You’ll work on market data handling, event-sourcing microservices, and trading utilities that operate with microsecond-scale response times. This role offers impact across Citi’s eTrading platforms and a chance to shape enterprise-level performance frameworks.

Responsibilities

• Hands-on work in the Java codebase within a low-latency, in-house framework
• Lead integration of features to meet goals and deploy products
• Analyze complex business and system processes to design solutions for high-level problems
• Provide expert Java low-latency development knowledge across multiple areas
• Consult with end users to capture function specifications and translate into design
• Influence and negotiate with senior leaders and external parties
• Assess risk and ensure compliance, ethics, and control issues are transparently managed
• Mentor and educate junior developers and less experienced seniors

Key requirements

• Subject Matter Expert in Applications Development
• Experience in Algorithmic Trading development, preferably in low latency
• Strong understanding of Market Data handling and technologies (e.g., KDB)
• Leadership, project management, and development skills
• Passion for building commercial-grade Java frameworks based on event sourcing microservices
• Proficiency with modern Java, JVM, Linux, system calls, and kernel concepts
• Knowledge of TCP/IP and kernel bypass technologies (e.g., Solarflare OpenOnload)
• Experience with performance assessment and tuning
• Ability to produce UML sequence diagrams and clear documentation
• Strong communication, relationship-building, and consensus skills
• Great communicator with high EQ
• Mentorship and coaching mindset
• Relationship and consensus-building abilities
• Java low-latency development
• Event-sourcing microservices
• Market data handling and KDB

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