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# Java Low Latency Engineer

- **Company:** DCV Technologies Limited
- **Location:** Greater London, UK
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Profiling, Data Structures, Linux, Distributed Systems, Memory Management, Java Virtual Machine (JVM), Java Native Interface, Enterprise Messaging Systems, Performance Tuning, Multithreading, Java Application Server, Performance Testing, Concurrency, Event Driven Architecture, Low Latency
- **Published:** October 27, 2026
- **Apply:** https://www.cv-library.co.uk/job/225764502/Java-Low-Latency-Engineer

## About the Role

* Expert-level Java development experience.
 * Proven experience with JVM performance tuning and optimisation.
 * Strong understanding of Data Structures and Algorithms.
 * Experience developing low latency, high throughput, event-driven systems.
 * Extensive knowledge of:
 + Concurrency and multithreading
 + Garbage Collection (GC)
 + JNI (Java Native Interface)
 + Java Unsafe
 + JNR-FFI
 * Experience building systems that operate within demanding latency constraints.

Must Have Experience:

 * Strong Core Java Development
 * JVM Performance Tuning
 * Low Latency / High Performance Systems
 * Concurrency & Multithreading
 * Data Structures & Algorithms
 * Networking
 * Linux

Nice to Have

 * Experience with Aeron messaging framework.
 * Exposure to financial trading, market data, or high-frequency systems.
 * Knowledge of distributed systems and messaging technologies.
 * Familiarity with modern observability and monitoring platforms.

## Description

We are seeking an experienced Java Low Latency Engineer / Java Performance Engineer to join a high-performing engineering team responsible for building and optimising mission-critical, event-driven systems operating in ultra-low latency environments.

You will work on the design, development, and optimisation of high-throughput, high-frequency systems where performance, scalability, and reliability are paramount. This role requires a deep understanding of JVM internals, concurrency, networking, memory management, and Linux-based performance tuning.

Key Responsibilities

 * Design and develop high-performance Java applications for low-latency environments.
 * Optimise JVM performance through advanced tuning, profiling, and troubleshooting.
 * Build resilient, event-driven and reactive systems capable of handling high transaction volumes.
 * Analyse and improve system performance across application, JVM, operating system, and hardware layers.
 * Implement efficient concurrency models and low-latency messaging solutions.
 * Work closely with architecture and infrastructure teams to deliver scalable, production-ready solutions.
 * Conduct performance testing, benchmarking, and capacity planning.
 * Investigate and resolve latency bottlenecks across distributed systems.