Ultra-Low Latency Fullstack Engineer (Java/C++) – HFT

Vallum Associates; City Of London; On-site; GBP 140,000 - 230,000; Full time

Job summary

Vallum Associates in London is seeking a seasoned Full Stack Engineer with a strong background in ultra-low-latency trading environments. You will shape real-time market data distribution, collaborating with quantitative, trading, and engineering teams to push speed and reliability to new limits.

You’ll design, develop, and maintain high-performance systems, optimize kernel bypass and network code on Linux, and deploy across numerous proprietary feeds.

Qualifications

• 5–10 years of software engineering experience in high-frequency trading or ultra-low-latency environments.
• Strong Core Java and C++ development experience.
• Deep Linux kernel bypass and low-latency network programming expertise.

Responsibilities

• Design and maintain ultra-low-latency market data apps.
• Develop low-latency network code and kernel bypass tech on Linux.
• Build high-throughput components in Core Java and C++.
• Manage deployments and automation via internal pipelines.
• Integrate 70+ proprietary feeds across EMEA and US.
• Perform latency analysis, profiling, and system tuning.
• Collaborate with cross-functional teams to ensure reliability.

Skills

Core Java

C++

Linux

Low-latency networking

Performance tuning

Troubleshooting

Communication

Tools

UBS Bluezone

UBSDeploy

Job description

Vallum Associates in London is seeking a seasoned Full Stack Engineer with a strong background in ultra-low-latency trading environments. You will shape real-time market data distribution, collaborating with quantitative, trading, and engineering teams to push speed and reliability to new limits.

You’ll design, develop, and maintain high-performance systems, optimize kernel bypass and network code on Linux, and deploy across numerous proprietary feeds.