Senior Low-Latency Java Engineer — Hybrid Role with Finance Impact

Citi; Greater London; Hybrid; GBP 90,000 - 150,000; Full time

Benefits offered by this job

27 days annual leave + bank holidays

Discretional annual bonus

Private Medical Care & Life Insurance

Employee Assistance Program

Pension Plan

Paid Parental Leave

Employee discounts

Learning and development resources

Job summary

Citi is seeking a senior Low Latency Java Engineer to join its London-based High Performance Architectures team. You will own and optimize low-latency Java/Rust frameworks, work on market data and algorithmic trading tech, and help scale eTrading platforms across Citi's global teams.

The role emphasizes hands-on coding, leadership, and mentoring, with potential hybrid work options and a strong focus on innovative financial systems.

Qualifications

• Senior level role leading applications systems analysis and programming.
• Expert in low-latency Java and related ecosystems.
• Experience with Algorithmic Trading and market data technologies (KDB).

Responsibilities

• Hands-on development in Java or Rust for low-latency systems in-house framework.
• Lead integration of functions to meet goals, deploy new products, and enhance processes.
• Analyze complex business processes and define solutions to high level problems.
• Provide world-class expertise in Java low latency development.
• Consult with end users to identify system specifications and incorporate into design.
• Influence and negotiate with senior leaders and external parties.
• Mentor junior developers and less experienced senior Java developers.

Skills

Low latency Java

Java

Algorithmic Trading

Market Data

KDB

C++

Leadership

Tools

KDB

Solarflare OpenOnload

Job description

Citi is seeking a senior Low Latency Java Engineer to join its London-based High Performance Architectures team. You will own and optimize low-latency Java/Rust frameworks, work on market data and algorithmic trading tech, and help scale eTrading platforms across Citi's global teams.

The role emphasizes hands-on coding, leadership, and mentoring, with potential hybrid work options and a strong focus on innovative financial systems.