Low Latency Java Developer

Harrington Starr; Greater London; On-site; GBP 110,000 - 170,000; Full time

Job summary

Harrington Starr in London seeks a hands-on Java Developer to build high-performance electronic trading systems. You will work with traders and quants to deliver low-latency components, market-data gateways, and algorithmic execution frameworks.

The role focuses on Java/JVM performance, FIX connectivity, Linux systems, and scalable trading infrastructure with ownership from design to production.

Qualifications

• 4-8 years of commercial software engineering experience
• Genuine low-latency / high-performance engineering
• Experience in electronic trading
• Exposure to FX, eFX or Crypto advantageous
• Strong Linux and performance-tuning knowledge
• Experience with FIX and/or electronic exchange connectivity
• Market-data and/or order-management systems
• Strong CS fundamentals and understanding of financial markets

Responsibilities

• Designing and developing low-latency, high-throughput Java trading systems
• Building pricing, hedging, risk and algorithmic execution components
• Collaborating with traders and quantitative developers
• Developing market-data and order gateways
• Integrating quantitative models into production trading systems
• Working with FIX, multicast and high-performance messaging
• Optimising JVM applications for low allocation, low GC and predictable latency
• Developing simulation, backtesting and regression-testing frameworks
• Taking ownership from design and architecture through to production

Skills

Java

Low-latency

Multithreading

Linux performance tuning

FIX

Aeron

Market data

High-frequency/Trading

Job description

London | Electronic Trading | Java | Low Latency

We're working with a technology-driven trading business looking for a hands-on Java Developer to build and enhance high-performance electronic trading systems.

You’ll work closely with traders and quantitative developers, building systems where latency, performance and reliability directly impact trading outcomes.

What you’ll be doing

• Designing and developing low-latency, high-throughput Java trading systems
• Building pricing, hedging, risk and algorithmic execution components
• Working directly with traders and quantitative developers
• Developing market-data and order gateways
• Integrating quantitative models into production trading systems
• Working with FIX, multicast and high-performance messaging
• Optimising JVM applications for low allocation, low GC and predictable latency
• Developing simulation, backtesting and regression-testing frameworks
• Taking ownership from design and architecture through to production

These responsibilities come directly from the underlying brief.

What we’re looking for

• Around 4-8 years' commercial software engineering experience (This is a mid level role)
• Genuine low-latency / high-performance engineering experience
• Experience within electronic trading
• Ideally exposure to FX, eFX or Crypto
• Strong multithreading and concurrency knowledge
• Experience with FIX and/or electronic exchange connectivity
• Market-data and/or order-management systems
• Strong Linux and performance-tuning knowledge
• Exposure to Aeron, multicast, shared memory or similar low-latency technologies
• Strong CS fundamentals and an understanding of financial markets

The core technical requirements in the original brief are Java/JVM performance, electronic trading, execution/hedging, market data, Aeron or equivalent, FIX, Linux, multithreading, shared memory and multicast.