Low-Latency Full Stack Engineer for HFT Systems (London)

Vallum Associates; Greater London; Hybrid; GBP 120,000 - 180,000; Full time

Job summary

Vallum Associates in London is seeking a seasoned Full Stack Engineer to join a high-frequency trading environment. This role is hybrid, onsite three days a week, focusing on building ultra-low-latency market data distribution systems and high-throughput Core Java components.

You will collaborate with quantitative, trading, and engineering teams to push speed and reliability, perform latency analysis, and optimize Linux kernel bypass networks.

Qualifications

• 5–10 years of software engineering in HFT or ultra-low-latency environments.
• Strong Core Java development experience.
• Deep Linux systems and kernel bypass tuning expertise.
• Experience with market data feeds and latency optimization.
• Knowledge of Refinitiv ETA, Denali, MPAC, Beacon protocols.
• Cross-team collaboration and problem-solving skills.

Responsibilities

• Design, develop, and maintain ultra-low-latency market data distribution systems.
• Build and support low-latency network programming on Linux.
• Develop high-throughput, low-latency Core Java components.
• Integrate data across 70+ direct feeds in EMEA, US Options, MiFID II.
• Collaborate with quantitative, trading, and engineering teams for reliable systems.
• Perform performance analysis, latency troubleshooting, and tuning.

Skills

Core Java

Linux systems

Low-latency network programming

Market data distribution

HFT/financial markets

Cross-team collaboration

Event-driven architecture

Distributed systems

CI/CD for LBL builds

Hardware timestamping

Job description

Vallum Associates in London is seeking a seasoned Full Stack Engineer to join a high-frequency trading environment. This role is hybrid, onsite three days a week, focusing on building ultra-low-latency market data distribution systems and high-throughput Core Java components.

You will collaborate with quantitative, trading, and engineering teams to push speed and reliability, perform latency analysis, and optimize Linux kernel bypass networks.