Efx Software Engineer

Salt; City Of London; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

A leading financial institution in London seeks an experienced eFX Software Engineer for a permanent role focusing on high-performance, scalable trading systems. You will enhance eFX systems, collaborating with cross-functional teams and influencing technical strategies. Ideal candidates will have strong Java expertise and experience in algorithmic trading. A flexible hybrid work model is offered.

Qualifications

• Strong expertise in core Java, especially in low-latency, high-throughput systems.
• Deep understanding of modern CPU architecture and performance tuning.
• Experience with networking protocols such as TCP and FIX.

Responsibilities

• Develop and maintain low-latency eFX trading systems.
• Design fault-tolerant system architectures.
• Collaborate with teams to refine engineering practices.

Skills

core Java

low-latency systems

modern CPU architecture

cache optimization

Linux performance tuning

networking protocols

quantitative finance

algorithmic trading

DevOps

Agile methodologies

TDD

CI/CD tools

API design

automated testing frameworks

Job description

Overview

eFX Software Engineer - Permanent | London (Hybrid) We're hiring an experienced eFX Software Engineer to join a leading financial institution's digital technology division. This is a permanent position based in London with a flexible hybrid working model. You'll be part of a high-performing team focused on delivering secure, high-performance, and scalable solutions to support institutional trading platforms.

Key Responsibilities

• Develop and maintain low-latency eFX trading systems using high-performance Java (e.g., lock-free, low-GC techniques).
• Design and implement fault-tolerant system architectures with <40 microseconds one-way latency.
• Collaborate with cross-functional teams to define and evolve architecture and engineering practices.
• Influence technical strategy, ensuring alignment with product and trading goals.
• Contribute to the evolution of FX pricing and risk management capabilities.

Required Skills & Experience

• Strong expertise in core Java, including low-latency, high-throughput systems.
• Deep understanding of modern CPU architecture, cache optimization, and Linux performance tuning.
• In-depth experience with networking protocols such as TCP, UDP, Multicast, FIX.
• Familiarity with quantitative finance, algorithmic trading, and implementing controls in automated trading systems.
• Proven experience with DevOps, Agile methodologies, TDD, and use of CI/CD tools.
• Background in API design and automated testing frameworks.

This is an excellent opportunity to work on complex, high-impact systems within a supportive and forward-thinking technology team.

Rates depend on experience and client requirements