Senior Developer - Huxley

Job Title: Senior EFX Developer – Contract
Location: London (Hybrid – 1 day per week in office)
Rate: Flexible (Inside IR35) £750PD – £1100PD Via Umbrella (Subject to experience) 
Contract Length: Long-term
Start Date: ASAP

Overview:
A leading investment bank is undertaking a full-scale rebuild of its electronic FX trading platform and is seeking a Senior EFX Developer to join the team on a long-term contract basis.

This is a greenfield project focused on performance, scalability, and low latency engineering. You'll be working on pricing, hedging, and booking systems that drive the bank’s FX trading capabilities.

Key Responsibilities:

• Build and optimise Java-based components for EFX trading
• Tune system performance (GC, OS-level, multithreading)
• Integrate and manage messaging protocols (FIX, Aeron, SBE)
• Work with Kafka, distributed caching (Hazelcast, Redis)
• Collaborate across front office, quant, and tech teams
• Write clean, testable, and high-performance code