Senior Ultra-Low Latency Engineer — Java/C++/Rust

Citi; New York (NY); Hybrid; USD 159,000 - 239,000; Full time

Benefits offered by this job

27 days annual leave

Bonus program

Private medical & Life Insurance

Employee Assistance Program

Pension Plan

Paid Parental Leave

Employee discounts

Learning resources

Job summary

Citi in London seeks a Senior Low Latency Engineer to architect and optimize real-time trading systems. You will work on Java, Rust, C++, and KDB within high-performance architectures supporting massive global flows, delivering microservices with microsecond response times and low-latency data processing.

You’ll lead design, development and mentoring, partner with traders and engineers across Citi Tech, and influence architectures across dozens of teams.

Qualifications

• SME in applications development
• Experience in algorithmic trading apps
• Market data handling knowledge (time-series databases)
• Leadership and project management experience

Responsibilities

• Hands-on in Java or Rust codebase with microservices
• Lead integration of new products and improve processes
• Analyze complex business and system processes
• Provide expertise in Java low latency development
• Mentor junior developers

Skills

Applications Dev SME

Algorithmic trading

Market data handling

Java development

Low latency engineering

Leadership

UML diagrams

Tools

KDB

Linux

Job description

Citi in London seeks a Senior Low Latency Engineer to architect and optimize real-time trading systems. You will work on Java, Rust, C++, and KDB within high-performance architectures supporting massive global flows, delivering microservices with microsecond response times and low-latency data processing.

You’ll lead design, development and mentoring, partner with traders and engineers across Citi Tech, and influence architectures across dozens of teams.