Home
Jobs
Source Group International
Senior Java Developer | Low Latency | London

Senior Java Developer | Low Latency | London

Hybrid

London, United kingdom

£ 165,000 /year

Senior

Full Time

03-11-2025

Share this job:

Score my CV

Skills

Java Architecture benchmarking

Job Specifications

Senior Java Developer | Low Latency | London

Our client is a specialist engineering consultancy known for solving some of the most demanding performance challenges across financial markets and technology. Their teams design, build, and optimise high-throughput, low-latency systems used by global institutions where reliability and speed are critical.

They are now looking for exceptional Java Engineers with proven experience in building high-performance, low-latency systems. This role involves working on complex, business-critical projects where every microsecond matters.

You’ll join a highly technical team known for solving tough engineering challenges and delivering efficient, elegant solutions across banking, trading, and financial technology environments.

Location: Primarily Remote, with travel to London City at least twice per week.

Package: Highly competitive base + benefits

What You’ll Do

Design, build, and maintain high-performance Java applications used in demanding real-time systems.
Develop and enhance testing and benchmarking frameworks to validate system performance.
Identify and eliminate bottlenecks through systematic performance analysis.
Contribute ideas and innovations to improve architecture and speed.
Quantify and document measurable performance improvements.

Requirements:

Degree-level education (or equivalent experience).
A strong and proven track record developing low-latency, high-throughput systems on JVM.
Understanding of JVM internals (GC, threading, concurrency, locking).
Commercial experience with high-performance Java systems.
Ability to communicate effectively with both technical and non-technical stakeholders.
Ability to work confidently across existing and greenfield projects.
Maintaining a high level of professionalism and precision.
Exposure to trading, banking or fintech environments is highly beneficial, particularly with front office trading.
Experience in a software consultancy or client-facing engineering role.

About the Company

Source Group International - Award-Winning Staffing Solutions Provider. We create value for our customers and community. Our recruitment solutions operate from offices globally, including London, Amsterdam, Zug, and Austin. Our vision is to make a lasting, positive impact on people's lives. We deliver talent into technology markets and add value to our customers through our Technology Recruitment brand - Source Technology and our Community Platform - Source Talks. We believe in making a positive difference to people... Know more