eFX Software Engineer

Salt Digital Recruitment; Greater London; Hybrid; GBP 100,000 - 125,000; Full time

Job summary

A leading financial institution in London is seeking an experienced eFX Software Engineer to enhance their digital technology division. This permanent position offers a hybrid work model, focusing on delivering scalable solutions for institutional trading platforms. Candidates should have strong expertise in core Java and experience in low-latency systems. Collaborative team members will contribute to high-impact projects in a supportive environment.

Qualifications

• Strong expertise in core Java, low-latency, and high-throughput systems.
• Deep understanding of modern CPU architecture and cache optimization.
• In-depth experience with networking protocols such as TCP, UDP, and FIX.

Responsibilities

• Develop and maintain low-latency eFX trading systems using high-performance Java.
• Design and implement fault-tolerant system architectures.
• Collaborate with cross-functional teams to define and evolve architecture.

Skills

Core Java expertise

Low-latency systems

Networking protocols (TCP, UDP, FIX)

DevOps practices

Agile methodologies

API design

Tools

CI/CD tools

Job description

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