Low-Latency Java Engineer for High-Performance Trading Systems

Randstad Technologies Recruitment; Greater London; Hybrid; GBP 120,000 - 194,000; Full time

Job summary

Randstad Technologies Recruitment in London is seeking a specialist High-Performance Java Engineer to expand agency liquidity on Principal Risk. You will join a team delivering low-latency trading platforms, working hybrid from London with three days in-office.

The role requires expert Java, JVM internals, and experience with memory profiling, GC tuning, and JNI/JNR-FFI. Collaboration with CRB and risk teams across EMEA and US is essential.

Qualifications

• Deep expertise in Java performance engineering and JVM internals.
• Experience with GC tuning, memory profiling, and low-latency systems.
• Familiarity with low-level Java APIs (Unsafe, JNI, JNR-FFI).

Responsibilities

• Design and build high-throughput, low-latency Java systems for trading platforms.
• Perform JVM tuning and memory optimization to achieve ultra-low latency.
• Collaborate with risk and engineering teams on cross-regional projects.
• Develop low-level Java solutions using JNI/JNR-FFI as needed.

Skills

Core Java & JVM

Low-Level APIs

Architecture & Concurrency

Networking & OS Internals

Tools

Aeron

Job description

Randstad Technologies Recruitment in London is seeking a specialist High-Performance Java Engineer to expand agency liquidity on Principal Risk. You will join a team delivering low-latency trading platforms, working hybrid from London with three days in-office.

The role requires expert Java, JVM internals, and experience with memory profiling, GC tuning, and JNI/JNR-FFI. Collaboration with CRB and risk teams across EMEA and US is essential.