Low Latency Rust Software Engineer

Overview

As a senior architect and developer in Citi’s High Performance Architectures team, you will build and evolve low-latency trading and market data systems. You’ll work hands-on on the Rust/Java codebase to deliver fast, reliable microservices and event-sourced frameworks that support eTrading platforms. You’ll mentor others, influence senior stakeholders, and contribute to modernization across Citi’s global teams. This role blends advanced systems engineering with finance-scale impact, offering growth, mentorship, and hybrid work options.

Pay / Benefits

• 27 days annual leave (plus bank holidays)
• Discretionary annual performance bonus
• Private medical care & life insurance
• Employee assistance program
• Pension plan
• Paid parental leave

Responsibilities

• Hands-on development in Rust/Java with a focus on low-latency microservices
• Lead integration of functions to meet goals and deploy new products
• Analyse complex business and system processes to design high-level solutions
• Provide world-class expertise in Java low-latency development
• Consult with end users to define system requirements and implement designs
• Mentor junior developers and less experienced engineers
• Contribute to market data handling utilities including replay and backtest/simulation
• Engage with senior leaders and external parties to influence direction

Key requirements

• SME in Applications Development
• Experience in algorithmic trading applications, preferably in low latency environments
• Knowledge of market data handling and time-series databases (e.g., KDB)
• Leadership, project management, and development skills
• Proficiency in modern Java, JVM, Linux, system calls and kernel
• Understanding of TCP/IP networks and kernel bypass (e.g., Solarflare OpenOnload)
• Performance tuning and architectural design skills
• Clear communication and diagrammatic documentation skills
• Relationship and consensus-building abilities
• Nice to have: background in C++

• Great communicator with high EQ
• ability to mentor others
• ability to negotiate with senior leaders
• Algorithmic trading development
• Low-latency Java and/or Rust/C++
• Market data handling

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