Low-Latency Java Engineer for Ultra-Fast Trading Platforms

Randstad Technologies; City Of London; Hybrid; GBP 95,000 - 140,000; Full time

Job summary

Randstad Technologies in London, UK is seeking a Software Engineer to join on a contract (Inside IR35) basis, focusing on high-performance Java and low-latency trading platforms for agency liquidity expansion.

You will design and optimize high-throughput, low-latency systems, perform JVM tuning and memory profiling, develop low-level Java solutions with Unsafe/JNI/JNR-FFI, and collaborate across cross-functional teams to deliver key regional projects.

Qualifications

• Expertise in Java high-performance engineering and JVM tuning.
• Experience with low-level Java APIs (Unsafe, JNI, JNR-FFI) and memory concerns.
• Strong understanding of event-driven design and concurrent programming.

Responsibilities

• Design, build, and optimize high-throughput, low-latency systems.
• Tune GC and profile memory for ultra-low latency.
• Implement low-level Java solutions using Unsafe/JNI/JNR-FFI.
• Collaborate with cross-functional teams on regional project deliverables.

Skills

Core Java

JVM Internals

GC Tuning

Low-Level Java APIs

JNI/JNR-FFI

Concurrency

Networking

Tools

Aeron

Linux

Job description

Randstad Technologies in London, UK is seeking a Software Engineer to join on a contract (Inside IR35) basis, focusing on high-performance Java and low-latency trading platforms for agency liquidity expansion.

You will design and optimize high-throughput, low-latency systems, perform JVM tuning and memory profiling, develop low-level Java solutions with Unsafe/JNI/JNR-FFI, and collaborate across cross-functional teams to deliver key regional projects.