eFX Developer

Caspian One; London; On-site; GBP 70,000 - 120,000; Full time

Job summary

A prominent financial services firm seeks a Senior Core Java Developer for a cutting-edge eFX trading platform. This pivotal role focuses on low-latency architectures and requires the ability to build high-performance execution services. Applicants should have strong Java expertise and a proven track record in system performance optimization.

Qualifications

• Strong experience in building systems with sub-millisecond latency targets.
• Proven background in low-latency messaging technologies.
• Experience in market connectivity using FIX and broker APIs.

Responsibilities

• Design and develop ultra-low latency components for pricing and execution.
• Collaborate with Traders and Quants to enhance performance.
• Lead critical systems development such as market gateways and order handlers.

Skills

Core Java

Low-latency programming

Threading

Memory management

Lock-free design

GC tuning

Performance profiling

Tools

Aeron

JMH

JFR

Job description

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Overview:

We’re hiring Senior Core Java Developers for a greenfield eFX trading platform build-out. The team is focused on ultra-low latency architecture (sub-millisecond) and is looking for engineers who understand performance at the microsecond level. This is a front-office role building execution services, market connectivity, and pricing engines from scratch.

Key Responsibilities:

• Design and build ultra-low latency components for pricing, execution, and market data distribution.
• Collaborate with Traders and Quants to optimise end-to-end performance.
• Lead development of critical path systems including market gateways, matching engines, and order handlers.
• Core Java (11+), with expertise in low-level programming: threading, memory management, lock-free design.
• Proven experience with low-latency techniques:
• Zero GC / off-heap memory
• False sharing avoidance
• GC tuning and performance profiling (JMH, JFR, GC logs, etc.)
• Experience building systems with sub-millisecond latency targets.
• Strong exposure to low-latency messaging technologies (e.g. Aeron, Chronicle Queue, SBE, UDP multicast).
• Market connectivity (e.g. FIX, exchange/broker APIs) experience.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Industries

  Financial Services, Capital Markets, and Investment Banking

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