eFX Software Engineer (Java)

Harnham; Greater London; Hybrid; GBP 144,000 - 176,000; Full time

Job summary

A leading financial services provider is seeking an eFX Software Engineer to build and optimise ultra-low-latency trading systems for global FX markets. This hybrid role requires a high-performance Java engineer skilled in complex technical challenges. Candidates should have strong experience in low-latency Java, a deep understanding of networking, and the ability to design high-performance architectures. This opportunity offers competitive compensation of up to £160,000 plus bonus and benefits.

Qualifications

• Strong experience in low-latency Java within trading or eFX.
• Deep understanding of networking and Linux performance tuning.
• Background in designing high-performance architectures.

Responsibilities

• Engineering sub-40 μs latency eFX trading systems.
• Designing real-time pricing and trading components.
• Influencing technical strategy across distributed systems.

Skills

Low-latency Java

Networking (TCP/UDP/FIX)

Linux tuning

Performance profiling

High-performance architectures

FX pricing knowledge

Mission-critical systems experience

Job description

eFX Software Engineer (Ultra‑Low Latency Java)

Hybrid / Remote - London

Up to £160,000 + Bonus + Benefits

We're supporting a major financial services organisation hiring an eFX Software Engineer to build and optimise ultra‑low‑latency trading systems used across global FX markets. If you're a high‑performance Java engineer who loves solving complex technical challenges at scale, this is a standout opportunity.

What you’ll work on:

• Engineering sub‑40 μs latency eFX systems with high throughput and fault tolerance
• Designing real‑time pricing, risk and trading components
• Evolving low‑latency Java patterns (lock‑free, low‑GC, CPU/cache optimisation)
• Working closely with quants, traders, architects and senior engineers
• Influencing technical strategy across distributed, performance‑critical systems

What we’re looking for:

• Strong experience in low‑latency Java within trading, eFX or electronic markets
• Deep understanding of networking (TCP/UDP/FIX), Linux tuning, performance profiling
• Background in designing high‑performance architectures and distributed systems
• Strong grasp of FX pricing, risk, and trading workflows
• Experience working on mission‑critical systems powering global trading
• Highly technical culture with genuine ownership and impact
• Flexibility in working hours and hybrid setup