Low-Latency C++ Trading Systems Engineer (Quant)

Millennium; Greater London; On-site; GBP 120,000 - 180,000; Full time

Job summary

Millennium in London seeks an experienced Quantitative Trading Systems Engineer to design and maintain real-time C++ trading infrastructure for live systematic trading across global markets.

You will work closely with the Senior Portfolio Manager to ensure production-grade, low-latency systems from market data ingestion to execution, including deployment, monitoring, and live trading support.

Qualifications

• Bachelor’s degree required; Master’s or PhD preferred in Computer Science, Engineering, Physics, Mathematics, Statistics, or related quantitative discipline
• 5+ years building production systems in an electronic trading environment in futures, FX, and/or fixed income products
• Strong C++ in a performance-critical, low-latency context (primary language for this role)
• Deep understanding of concurrent, real-time systems design
• Strong software engineering fundamentals, including testing, version control, and code quality
• Strong Linux development experience
• Familiarity with monitoring, controls, and production support in a front-office setting is advantageous
• Experience working with shared internal services, APIs, or established platform infrastructure is highly valuable

Responsibilities

• Build the team’s C++ latency-sensitive trading systems from market data ingestion to order execution
• Productionise performance-critical signal computation within the trading systems
• Build the supporting research infrastructure, including replay and data management
• Support execution-related workflows across systematic strategies in Futures, FX, and Fixed Income
• Specify the team’s performance and infrastructure requirements to central technology teams and work with them to deliver
• Partner with broader technology teams to make effective use of the firm’s shared platforms and services - execution, risk, portfolio management, data, and monitoring
• Implement and maintain team-level trading controls and support live production processes, while ensuring appropriate integration with the firm’s broader trading control framework

Skills

C++

Low-latency

Production trading

Concurrent real-time

Software engineering

Linux

Monitoring/Production support

Internal services/APIs

Education

Bachelor's degree

Advanced degree preferred

Job description

Millennium in London seeks an experienced Quantitative Trading Systems Engineer to design and maintain real-time C++ trading infrastructure for live systematic trading across global markets.

You will work closely with the Senior Portfolio Manager to ensure production-grade, low-latency systems from market data ingestion to execution, including deployment, monitoring, and live trading support.