Java Low Latency Engineer

DCV Technologies; City Of London; Hybrid; GBP 90,000 - 150,000; Full time

Benefits offered by this job

Hybrid work model

Job summary

DCV Technologies in London is seeking a Java Low Latency Engineer to optimize performance, tune the JVM and build high‑frequency, low‑latency systems.

The role requires deep Core Java, concurrency, memory management and networking expertise to operate in a demanding environment.

Qualifications

• Strong Core Java and JVM performance tuning.
• Excellent knowledge of data structures and algorithms.
• Experience with concurrency, multithreading and low-latency system design.
• Knowledge of GC, JNI and Java Unsafe.
• Understanding of CPU architecture, shared memory and memory-mapped files.
• Experience with networking protocols such as TCP and UDP.
• Strong Linux internals and system-level performance optimization.
• Nice to have Aeron messaging and exposure to high-frequency trading environments.

Skills

Core Java

JVM tuning

Data structures

Algorithms

Concurrency

Multithreading

Low-latency design

GC

JNI

Java Unsafe

JNR-FFI

CPU architecture

Shared memory

Memory-mapped files

Networking TCP/UDP

Linux internals

Aeron

HFT experience

Job description

Position: Java Low Latency Engineer

Location: London, UK (Hybrid-2/3 days from office)

Long term contract position

Role Overview

We are looking for an experienced Java Low Latency Engineer with strong expertise in Java performance optimization, JVM tuning, and high-performance system development. The ideal candidate will have experience building event-driven, concurrent systems designed for low-latency and high-frequency environments

Required Skills & Experience

• Strong Core Java and JVM performance tuning expertise.
• Excellent knowledge of Data Structures and Algorithms.
• Experience with concurrency, multithreading, and low-latency system design.
• Knowledge of GC, JNI, Java Unsafe, and JNR-FFI.
• Strong understanding of CPU architecture, shared memory, and memory-mapped files.
• Experience with networking protocols such as TCP and UDP.
• Good understanding of Linux internals and system-level performance optimization.

Nice to Have

• Experience with Aeron messaging and transport technology.
• Background in high-frequency trading (HFT), electronic trading, or other performance-critical systems