Senior Java Low-Latency Developer – Trading Systems (Hybrid, London)

Gazelle Global; Greater London; Hybrid; GBP 85,000 - 130,000; Full time

Job summary

Gazelle Global is seeking a Senior Java Low-Latency Developer for a 12-month contract in London, on a hybrid basis (3 days on-site per week). You will join a global engineering function delivering technology where performance, resilience and reliability are critical.

The role focuses on building and enhancing high-performance trading, exchange connectivity and Direct Market Access platforms, collaborating with Product, Engineering, QA and Production Support to turn requirements into robust,

Qualifications

• Strong experience with Core Java and JDK 17+ in low-latency systems.
• Proven ability to build high-performance trading and exchange connectivity platforms.
• Expertise in multithreading, concurrency and JVM tuning.
• Familiarity with CI/CD, Agile practices and automated testing.

Responsibilities

• Develop and enhance high-performance trading platforms with low latency.
• Collaborate with Product, Engineering, QA and Production Support to deliver scalable solutions.
• Drive continuous performance improvement and profiling.
• Work on Direct Market Access platforms and exchange connectivity.

Skills

Core Java, JDK 17+

Low-latency/high-throughput trading

Multithreading, concurrency and JVM

Mechanical sympathy and profiling

Microservices and distributed systems

Event-driven and asynchronous

Automated and performance testing

CI/CD and Agile engineering

FIX Protocol or binary protocols

Job description

Gazelle Global is seeking a Senior Java Low-Latency Developer for a 12-month contract in London, on a hybrid basis (3 days on-site per week). You will join a global engineering function delivering technology where performance, resilience and reliability are critical.

The role focuses on building and enhancing high-performance trading, exchange connectivity and Direct Market Access platforms, collaborating with Product, Engineering, QA and Production Support to turn requirements into robust,